Placement Aptitude (Quant, Logical, Verbal) Module 17 – Grammar and usage

Articles, prepositions and determiners

Choose a, an, the or no article by sound and meaning, use prepositions of time and place and fixed ones such as "married to", and match determiners to nouns.

Intermediate
20 minutes
Examples run with Node.js 24.21.0, Python 3.14.8 and Pyodide 314.0.7
By MySmartCoPilot

Free: The first sound and the meaning choose the article · At a point, on a day or a surface, in a period or a space · Some words take a fixed preposition, and some take none · 2 more sections. With a pass: 3 in-depth parts and 3 interview answers, about 13 minutes.

What you will learn

Choose a, an, the or no article from a noun's first sound and its meaning
Use at, on and in for times and places
Use the fixed preposition a word's dictionary entry gives, or none where it takes none
Choose determiners that match countable and uncountable nouns, such as few, little, fewer and less

Before you start

Parts of speech and sentence structure

What you’ll learn · Before you start

What you will learn

Choose a, an, the or no article from a noun's first sound and its meaning
Use at, on and in for times and places
Use the fixed preposition a word's dictionary entry gives, or none where it takes none
Choose determiners that match countable and uncountable nouns, such as few, little, fewer and less

Before you start

Parts of speech and sentence structure

On this page

Why is it an hour but a university, and married to someone but discuss a plan, never discuss about it? Articles and the other determiner: A word that starts a noun phrase and says which thing is meant or how much of it, such as the, an, this, my, some or every. More in “Parts of speech and sentence structure” come at the start of a noun phrase and say which thing is meant or how much of it: a, an, the, this, some, few, much, each. Prepositions such as in, on, at, of and to link a noun to the rest of the sentence. Most test errors with them come from five rules: a or an by the first sound, the for something specific or unique, no article for plural or uncountable nouns used in general, the preposition that a time or a place takes, and the fixed preposition that some words need (“interested in”, “married to”). GATE’s General Aptitude syllabus names articles and prepositions among the grammar it tests.

The first sound and the meaning choose the article

A or an depends on the first sound, not the first letter: an hour, because the h is silent; a university, which starts with a “y” sound; a one-way ticket, which starts with a “w” sound. For an abbreviation said letter by letter: An abbreviation read out one letter at a time, such as MBA, FIR or UPSC. A or an before it follows the sound of its first letter's name: an MBA, a UPSC exam., the Oxford Advanced Learner’s Dictionary’s rule is to follow how the first letter is said: an MBA and an FIR, because M and F are said “em” and “ef”, but a UPSC exam, because U is said “you”.

The marks something specific: mentioned before, made clear by the rest of the sentence, or the only one of its kind, as in “the warden of our hostel” and “the sun”. No article is needed for plural or uncountable noun: A noun with no plural that takes a singular verb and no a or an, such as information, advice, news, equipment or furniture. More in “Subject-verb agreement and pronouns” used in general: “Freshers need guidance”, “Advice is easy to give”. The same dictionary lists advice, equipment, feedback, furniture, information, luggage, news, progress and software among uncountable nouns that are often used wrongly: they take no a and no plural, so “a piece of advice” and “some information”, never “an advice” or “informations”.

Three questions that choose the article

Text description of the diagram

The figure is a flow of three questions, asked in order. Each "yes" leads to an answer box on the right; each "no" leads down to the next question.

1. "Specific or one of a kind?", that is, mentioned before, made clear by the sentence, or the only one there is. Yes: "the", as in "the sun" and "the form". 2. "Plural or uncountable?", used in general rather than a particular one. Yes: no article, as in "Advice helps." 3. "First sound a vowel sound?", where the sound decides, not the letter. Yes: "an", as in "an hour" and "an MBA". No: "a", as in "a user", "a desk" and "a one-way ticket".

A note at the bottom adds that uncountable nouns that need an amount take "some", as in "some advice".

Step through the three questions on four blanks:

Interactive · stage by stage Three questions, four blanks Step through four blanks. The questions are asked in order, and the first that settles the blank gives the article.

The drawing shows the whole scene; its 10 steps are listed below.

Every step as text

Blank 1. 'She is ___ honest officer.' She is one officer among many, not one the reader already knows, so the answer to question 1 is no.
Question 2. Officer is a singular noun that can be counted, so it needs a or an.
Question 3. Say the word. The h of honest is silent, so it starts with a vowel sound.
An. 'She is an honest officer.' The first sound decided, not the first letter.
Blank 2. 'He has ___ MBA from ___ university in Pune.' Both nouns are singular and countable, so question 3 decides each.
The second blank. University starts with a "y" sound, a consonant sound, although its first letter is a vowel.
An, then a. 'He has an MBA from a university in Pune.' Two blanks in one sentence, two different articles.
Blank 3. 'Can you give me ___ advice about the interview?' Advice is uncountable, so question 2 says yes: no a, no an, no plural.
Some. An amount of an uncountable noun takes some: 'Can you give me some advice?' 'An advice' is the error.
Blank 4. '___ sun rose at six.' There is only one sun, so question 1 says yes, and the article is the.

The program compares the first-sound rule with a first-letter rule on eighteen phrases:

A or an by first sound against a first-letter rule, on eighteen phrases Python · a_or_an.py

# A or an by the first sound, against a rule that looks only at the first letter. The first sounds are taken from the
# dictionary's pronunciations (hour /ˈaʊə(r)/, university /ˌjuːnɪˈvɜːsəti/, one /wʌn/ …). Abbreviations said letter by
# letter follow the name of their first letter, as the dictionary's note on "a" says.
FIRST_SOUND = {  # word → True when it starts with a vowel sound
    "hour": True, "honest": True, "hostel": False, "university": False, "unique": False, "user": False,
    "umbrella": True, "one-way": False, "european": False, "interview": True, "answer": True, "desk": False,
}
VOWEL_SOUND_LETTERS = set("AEFHILMNORSX")  # A /eɪ/, E /iː/, F /ef/, H /eɪtʃ/, I /aɪ/, L /el/, M /em/, N /en/ …


def by_sound(word):
    if word.isupper():  # an abbreviation said letter by letter
        return "an" if word[0] in VOWEL_SOUND_LETTERS else "a"
    return "an" if FIRST_SOUND[word.lower()] else "a"


def by_letter(word):
    return "an" if word[0].lower() in "aeiou" else "a"


PHRASES = ["answer", "desk", "hour", "honest", "hostel", "university", "unique", "user", "umbrella", "one-way",
           "European", "interview", "MBA", "FIR", "SBI", "UPSC", "NGO", "HR"]
wrong = 0
for word in PHRASES:
    right, letter_rule = by_sound(word), by_letter(word)
    mark = "" if right == letter_rule else f"   (the first letter would give {letter_rule})"
    wrong += right != letter_rule
    print(f"{right} {word}{mark}")
print(f"The first-letter rule gets {wrong} of {len(PHRASES)} wrong.")

Output

an answer
a desk
an hour   (the first letter would give a)
an honest   (the first letter would give a)
a hostel
a university   (the first letter would give an)
a unique   (the first letter would give an)
a user   (the first letter would give an)
an umbrella
a one-way   (the first letter would give an)
a European   (the first letter would give an)
an interview
an MBA   (the first letter would give a)
an FIR   (the first letter would give a)
an SBI   (the first letter would give a)
a UPSC   (the first letter would give an)
an NGO   (the first letter would give a)
an HR   (the first letter would give a)
The first-letter rule gets 13 of 18 wrong.

Recorded with Python 3.14.8 on macOS 26 arm64. To run it yourself: mise exec python@3.14.8 -- python3 a_or_an.py

The list is built from the traps that tests use, which is why the first-letter rule fails on 13 of its 18 phrases; on ordinary words such as answer and desk the two rules agree.

Key idea

Say the phrase before you choose: a or an follows the first sound, the marks something specific or unique, and a plural or uncountable noun used in general takes no article.

Checkpoint

Check: A, an, the or no article

Question 1 of 2 Fill the blank: "He works for ___ European bank."
Choose one answer.

the no article a an

Show the answer: Question 1 of 2

Answer: a

Say the word: "European" begins with a "y" sound, so "a European bank". The first-letter rule gets it wrong, as the program's list shows.
Question 2 of 2 "___ freshers need guidance." Which article fits a plural noun used in general?
Choose one answer.

No article An The A

Show the answer: Question 2 of 2

Answer: No article

"Freshers need guidance" speaks of freshers in general, so no article. "The freshers of our batch" would be specific and take "the".

At a point, on a day or a surface, in a period or a space

The same three words serve times and places:

	at	on	in
Time	a clock time or a point: at nine, at noon	a day: on Monday, on Independence Day	a longer period: in May, in 2026, in the morning
Place	a point: at the gate, at the station	a surface or a line: on the desk, on the platform	a space or an area: in the hall, in Chennai

The three words grow with the size of the time or the place: a point takes at, a day or a surface on, and a longer period or a space in. So “The interview starts ___ ten ___ Monday” takes at and on: a clock time, then a day.

Checkpoint

Check: At, on and in for times and places

Question 1 of 2 Fill the blank: "The results come out ___ May."
Choose one answer.

by on in at

Show the answer: Question 1 of 2

Answer: in

Times grow from a point to a day to a period: at nine, on Monday, in May. A month is a period, so "in May".
Question 2 of 2 Fill both blanks: "The forms are ___ the desk, and the office opens ___ nine."
Choose one answer.

on, in at, on on, at in, at

Show the answer: Question 2 of 2

Answer: on, at

Use the table: a surface takes "on" and a clock time "at": "on the desk", "at nine".

Some words take a fixed preposition, and some take none

Many words take a fixed preposition: The preposition a word always takes, which its dictionary entry shows, such as interested in, married to, depend on or congratulate somebody on., which their dictionary entry shows:

Word	Takes
interested	in
good	at
afraid	of
married	to
consist	of
depend	on
congratulate somebody	on
superior	to
prefer one thing	to another
discuss	no preposition

You discuss a problem, with nothing between the verb and its object, so “We discussed ___ the schedule” takes nothing: “We discussed the schedule.” The Oxford dictionary’s note on “discuss about” calls it “still considered incorrect by most people, teachers and in exams”. You request something, while the noun takes for: “a request for leave”. These pairs cannot be worked out from the meaning, only learnt, and when you are unsure, the pattern in the word’s entry settles it, as in married to somebody.

Checkpoint

Check: Fixed prepositions, and none

Question 1 of 2 Fill the blank: "Your score depends ___ your accuracy."
Choose one answer.

of from no preposition on

Show the answer: Question 1 of 2

Answer: on

"Depend" takes the fixed preposition "on", which its dictionary entry shows: "depend on something".
Question 2 of 2 Which sentence is correct?
Choose one answer.

We discussed over the timetable. We discussed the timetable. We discussed about the timetable. We discussed on the timetable.

Show the answer: Question 2 of 2

Answer: We discussed the timetable.

You discuss something. The noun can take "about", as in "a discussion about the timetable", but the verb takes its object directly.

Few, little, fewer and less follow countability

Determiners that give a quantity change with the noun: some go only with nouns you can count.

With plural countable nouns	With uncountable nouns	Meaning
many	much	a large number or amount
few	little	not many, not much
a few	a little	some, a small number or amount
fewer	less	a smaller number or amount

Few and little stress how small the number is, while a few and a little mean “some”: “Few candidates cleared the cut-off” is bad news, and “A few candidates cleared the cut-off” sounds hopeful. Each and every take a singular noun: “Every candidate needs an ID”.

Checkpoint

Check: Determiners and countability

Question 1 of 2 Fill the blank: "There isn't ___ time left before the exam."
Choose one answer.

many few a few much

Show the answer: Question 1 of 2

Answer: much

The table pairs the words by countability: many and much, few and little, a few and a little, fewer and less. "Time" is uncountable here, so "much".
Question 2 of 2 Which sentence is correct?
Choose one answer.

Every candidate needs an ID. Every candidate need an ID. Each candidates needs an ID. Every candidates need an ID.

Show the answer: Question 2 of 2

Answer: Every candidate needs an ID.

"Each" and "every" take a singular noun, and the verb agrees with it: "Every candidate needs an ID".

Practise: articles, prepositions and determiners

The exercise picks a or an for abbreviations said letter by letter, and the untimed questions after it start from your weakest idea.

Exercise · Easy · Python

A or an before an abbreviation said letter by letter

An abbreviation said letter by letter, such as MBA or UPSC, takes a or an by the sound of its first letter's name, not by whether that letter is a vowel. The names of A, E, F, H, I, L, M, N, O, R, S and X begin with a vowel sound (ay, ee, ef, aitch, eye, el, em, en, oh, ar, es, ex); every other letter's name, U (you) included, begins with a consonant sound.

Write article(abbreviation), which returns only the article, "a" or "an", for an abbreviation in capital or small letters, with or without full stops between them ("M.B.A." is the same as "MBA"): article("MBA") is "an" and article("UPSC") is "a".

The starter code looks at whether the first letter is a vowel, the rule that fails on MBA, FIR and UPSC alike.

Starter code · article.py

VOWEL_SOUND_LETTERS = set("AEFHILMNORSX")


def article(abbreviation):
    """'a' or 'an' before an abbreviation said letter by letter, by the sound of its first letter's name."""
    # Replace this line with your code: it looks at the letter, not at its sound.
    return "an" if abbreviation[0].upper() in "AEIOU" else "a"

The sample tests · test_article.py

from article import article


def test_m_is_said_em():
    """M is said em, a vowel sound"""
    assert article("MBA") == "an"


def test_u_is_said_you():
    """U is said you, a consonant sound"""
    assert article("UPSC") == "a"


def test_f_is_said_ef():
    """F is said ef"""
    assert article("FIR") == "an"


def test_s_and_n():
    """S is es and N is en"""
    assert (article("SBI"), article("NGO")) == ("an", "an")


def test_consonant_names():
    """P, B and C have consonant-sound names"""
    assert (article("PAN"), article("BPO"), article("CV")) == ("a", "a", "a")


def test_vowel_letters():
    """I and O are vowels and are said with vowel sounds"""
    assert (article("IIT"), article("OTP")) == ("an", "an")


def test_full_stops_and_small_letters():
    """M.B.A. and mba are the same abbreviation"""
    assert (article("M.B.A."), article("mba")) == ("an", "an")

A hint

Remove the full stops with abbreviation.replace(".", ""), take the first character, make it a capital with .upper(), and test whether it is in VOWEL_SOUND_LETTERS.

The sample tests run on this device, in your browser (Pyodide): nothing is sent to mysmartcopilot.com. The first run downloads Python (about 13.5 MB), which is kept for the next runs. A check in your browser is feedback for you, not proof that the code is right for every input.

Twelve article, preposition and determiner items with full working Pro: opens with a Pro, Premium or Ultimate pass

Items on this topic test one small word at a time, so each one turns on a single clue: a sound, a kind of time or place, a dictionary entry or whether a noun can be counted. Here are twelve original items in four groups, each worked from its clue, with the wrong option it was built around.

In this part:

Articles, worked from the sound and the meaning
Prepositions of time and place, worked
Fixed prepositions, worked from the dictionary entries
Determiners, worked from countability and meaning
The trap behind each wrong answer

1 runnable example (Python) · about 3 minutes

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Fixed prepositions and determiners in depth, from the dictionary entries Pro: opens with a Pro, Premium or Ultimate pass

Fixed prepositions cannot be worked out, only learnt and checked, and a few test items mark as wrong forms that the dictionaries accept. This part gives a drill built from the entries, the items this module will not set, and the determiners that change meaning by a single word.

In this part:

Twelve fixed prepositions, drilled from their entries
Words that take no preposition, and the notes that settle them
Items this module will not set, and why
Few, a few, little and a little, worked with numbers

1 runnable example (Python) · about 4 minutes

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A ten-minute timed set, with answers and a rubric Pro: opens with a Pro, Premium or Ultimate pass

Small words are quick to answer and easy to get wrong at speed, so this set trains the habit of naming the clue before choosing. Take about a minute an item, mark your answers against the worked keys, and use the rubric to plan your practice.

In this part:

Ten items for ten minutes
Worked answers, with the clue that decides each
A rubric: what your score says and what to practise next

1 runnable example (Python) · about 2 minutes

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Interview questions

Fresher · Warm-up

Why do we write "an hour" but "a university"?

Because a and an follow the first sound of the next word, not its first letter: an goes before a vowel sound and a before a consonant sound. The h of "hour" is silent, so the word starts with a vowel sound and takes an. "University" starts with the letter u but with a "y" sound, which is a consonant sound, so it takes a. The same rule gives "a one-way ticket" (a "w" sound) and "an honest answer" (a silent h). Abbreviations said letter by letter follow the name of their first letter: an MBA, because M is said "em", and a UPSC exam, because U is said "you". When in doubt, say the phrase aloud.
Fresher

Find and fix every error in this line of an email: "Kindly discuss about the offer with a HR executive and send the informations by Monday." Name the rule behind each fix.

Model answer, Pro. Model answers open with any pass; prices are in the notice on this page. First step and follow-ups
Fresher

One placement report says "Few students cleared the aptitude round", another "A few students cleared the aptitude round". If 9 of 240 students cleared it, which sentence fits better, what does each suggest to a reader, and how should the number be reported?

Model answer, Pro. First step and follow-ups
Fresher

A practice app marks "The panel is comprised of five members" as wrong and gives "The panel comprises five members" as the only answer. Is the app right? Use the dictionary entry to decide, and say how a fair item would test "comprise".

Model answer, Pro. First step and follow-ups

Key takeaways

A or an follows the first sound: an hour, a university, an MBA, a UPSC exam.
The marks something specific or unique; plural and uncountable nouns used in general take no article.
At marks a point, on a day or a surface, and in a longer period or an enclosed space.
Fixed prepositions come from the dictionary entry, and discuss takes none.
Few and little mean not many and not much; a few and a little mean some.

Terms in this lesson

abbreviation said letter by letter: An abbreviation read out one letter at a time, such as MBA, FIR or UPSC. A or an before it follows the sound of its first letter's name: an MBA, a UPSC exam.
fixed preposition: The preposition a word always takes, which its dictionary entry shows, such as interested in, married to, depend on or congratulate somebody on.

References

Oxford Advanced Learner's Dictionary: a, an (the note on sounds and abbreviations) (Oxford University Press)
Oxford Advanced Learner's Dictionary: the (Oxford University Press)
Oxford Advanced Learner's Dictionary: advice (uncountable) (Oxford University Press)
Oxford Advanced Learner's Dictionary: information, with the list of uncountable nouns often used wrongly (Oxford University Press)
Oxford Advanced Learner's Dictionary: discuss (the note on "discuss about") (Oxford University Press)
Oxford Advanced Learner's Dictionary: comprise (the notes on "comprise of" and "be comprised of") (Oxford University Press)
Oxford Advanced Learner's Dictionary: at, on and in (time and place) (Oxford University Press)
Oxford Advanced Learner's Dictionary: few and little (Oxford University Press)
Learn and Practise Grammar: quantifiers more, less and fewer (Oxford University Press)
Practical English Usage: language terminology (article, determiner, quantifier) (Oxford University Press)
GATE 2027 General Aptitude syllabus: Verbal Aptitude (articles, prepositions) (IIT Madras)
TCS iON National Qualifier Test (NQT): Verbal Ability in NQT Cognitive (TCS iON)

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In this module: Grammar and usage

Parts of speech and sentence structure Free core, Pro depth: 7 of 25 minutes free
Subject-verb agreement and pronouns Free core, Pro depth: 6 of 20 minutes free
Tenses, modals and conditionals Free core, Pro depth: 7 of 20 minutes free
Articles, prepositions and determiners Free core, Pro depth: 7 of 20 minutes free

Your country

Articles, prepositions and determiners

What you will learn

Before you start

What you will learn

Before you start

The first sound and the meaning choose the article

At a point, on a day or a surface, in a period or a space

Some words take a fixed preposition, and some take none

Few, little, fewer and less follow countability

Practise: articles, prepositions and determiners

A or an before an abbreviation said letter by letter

Results of the sample tests

Twelve article, preposition and determiner items with full working Pro: opens with a Pro, Premium or Ultimate pass

Fixed prepositions and determiners in depth, from the dictionary entries Pro: opens with a Pro, Premium or Ultimate pass

A ten-minute timed set, with answers and a rubric Pro: opens with a Pro, Premium or Ultimate pass

Interview questions

Why do we write "an hour" but "a university"?

Find and fix every error in this line of an email: "Kindly discuss about the offer with a HR executive and send the informations by Monday." Name the rule behind each fix.

One placement report says "Few students cleared the aptitude round", another "A few students cleared the aptitude round". If 9 of 240 students cleared it, which sentence fits better, what does each suggest to a reader, and how should the number be reported?

A practice app marks "The panel is comprised of five members" as wrong and gives "The panel comprises five members" as the only answer. Is the app right? Use the dictionary entry to decide, and say how a fair item would test "comprise".

Key takeaways

References

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