Why this topic matters · 7 min read
Fill in the Blanks (FIB) is a high-frequency section in Agniveer Vayu English, typically 5-10 questions per paper. Tests grammar (tenses, articles, prepositions, conjunctions) and vocabulary (synonyms, contextual word choice). Weightage: ~15-20% of English. Requires speed + accuracy; most aspirants lose marks due to careless reading of context, not lack of knowledge.
Grammar-Based Blanks: Tenses & Verb Forms
These blanks require you to identify the correct verb form based on time reference and sentence structure. The key is reading the entire sentence for time clues (yesterday, will, since, for, etc.). Common patterns: simple past vs present perfect, will vs going to, gerund vs infinitive. Agniveer papers often mix tenses within a single sentence to test attention.
- Identify time markers: yesterday, tomorrow, since 2020, for 3 years, currently, usually
- Simple past (completed action): He went to Delhi yesterday. Use: went, saw, ate
- Present perfect (recent past, still relevant): He has gone to Delhi. Use: has/have + past participle
- Gerund after prepositions: He is interested in learning (NOT learn). After: in, of, for, by, about
- Infinitive after modals: He can go (NOT goes). After: can, will, should, must, may
- Continuous tenses for ongoing: She is studying now. Use: is/are/was/were + -ing
Key formulas
Present Perfect vs Simple Past
Has/have + past participle = recent/unfinished. Simple past = finished, specific time given
When: When sentence has 'since', 'for', 'just', 'yet', 'already' use present perfect. When sentence has 'yesterday', 'last week', 'in 2020' use simple past
Gerund vs Infinitive Rule
Preposition + gerund (-ing). Modal/to + infinitive (base form)
When: After prepositions (in, of, for, by, about, without): use -ing. After modals (can, will, should) or 'to': use base form
Worked examples
Sentence: She _____ in this company for 5 years. Options: works, is working, has been working, worked. Answer: has been working (duration from past to now = present perfect continuous)
Sentence: After _____ the exam, he felt relieved. Options: complete, completing, to complete, completed. Answer: completing (after = preposition, needs gerund)
Articles: A, An, The
Articles are tricky because they seem simple but require context awareness. 'The' is used for specific/known things. 'A/An' for general/first mention. No article for uncountable nouns or general plurals. Agniveer tests this by hiding the context clue earlier in the passage.
- THE: specific thing (the Prime Minister, the Taj Mahal), unique things (the sun, the moon), second mention
- A/AN: first mention, general countable singular (a teacher, an apple), professions (He is a doctor)
- NO ARTICLE: uncountable nouns (water, information, advice), plural general (Dogs are loyal), languages (He speaks English)
- Common trap: 'He gave me an advice' is WRONG. Advice is uncountable. Correct: 'He gave me advice' or 'a piece of advice'
- Nationalities/languages: No article. 'He is Indian' (not 'an Indian' unless referring to a person). 'I speak Hindi' (not 'the Hindi')
Prepositions: In, On, At, By, With, For
Prepositions show relationship between words. They're context-dependent and often tested in fixed phrases. Agniveer loves testing 'in time' vs 'on time', 'by' for agent/deadline, 'with' for tool/companion. Memorize common collocations rather than trying to 'understand' each one.
- Time: IN (month, year, season), ON (date, day), AT (specific time like 3 PM), BY (deadline)
- Place: IN (enclosed space), ON (surface), AT (specific point)
- Agent/instrument: BY (agent: written by Sharma), WITH (tool: cut with knife)
- Fixed phrases: in case, in fact, on purpose, by chance, with difficulty, for the sake of, in addition to
- Common errors: 'interested in' (NOT on), 'aware of' (NOT about), 'married to' (NOT with), 'different from' (NOT than in formal)
Worked examples
Sentence: He arrived _____ time for the meeting. Options: in, on, at, by. Answer: in (in time = with time to spare; on time = exactly at scheduled time, but 'in time' is more common here)
Sentence: The report was prepared _____ the team _____ great care. Options: by/with, in/with, of/with, by/in. Answer: by/with (prepared by = agent; with = manner/tool)
Conjunctions & Connectors: And, But, Because, Although, However
Conjunctions link ideas. Coordinate conjunctions (and, but, or) join equal ideas. Subordinate conjunctions (because, although, if, unless) show cause/contrast/condition. Agniveer tests logical flow — the blank word must match the relationship between the two clauses.
- Cause: because, since, as (He didn't go because he was sick)
- Contrast: but, however, although, yet, whereas (He studied hard but failed)
- Condition: if, unless, provided that (Unless you study, you won't pass)
- Addition: and, moreover, furthermore, in addition (He is smart and hardworking)
- Result: so, therefore, thus, consequently (He studied hard, so he passed)
- Trap: 'Although' + 'but' together is WRONG. Use one or the other: Although he studied, he failed OR He studied but failed
Vocabulary: Synonyms & Contextual Word Choice
These blanks test if you know the right word for the context. Not just synonyms — the word must fit the tone, register, and meaning. Agniveer uses options that are similar but not identical. Read the full sentence and surrounding context to catch subtle differences.
- Tone matters: 'big' vs 'enormous' vs 'vast' — choose based on formality and context
- Denotation vs connotation: 'thin' (neutral) vs 'skinny' (negative) vs 'slender' (positive)
- Phrasal verbs: 'look after' (care for), 'look into' (investigate), 'look up to' (admire) — different meanings
- Word families: 'strong' (adjective), 'strength' (noun), 'strengthen' (verb) — use the right form
- Context clues: If sentence says 'He was sad and ____', the blank needs a negative emotion word, not 'happy'
⚠ Common mistakes to avoid
- Ignoring time markers: Aspirants choose 'goes' when the sentence has 'since 2020' (needs present perfect 'has been going'). Always scan for yesterday/tomorrow/since/for first.
- Mixing 'in time' and 'on time': Both are correct but mean different things. 'In time' = with time to spare. 'On time' = exactly at scheduled time. Context decides.
- Using article with uncountable nouns: Writing 'an information' or 'a advice' — these are uncountable. No article or 'a piece of' instead.
- Conjunction logic errors: Choosing 'because' when 'although' is needed, or vice versa. Read the relationship between clauses carefully.
- Careless reading of options: All four options look similar. Spend 5 seconds reading each option fully before deciding. Don't skim.
🧠 Memory aids
- TAPS for articles: THE (specific), A/AN (first mention/general), Plural (no article), Singular uncountable (no article)
- TIME-PLACE rule: IN (month/enclosed), ON (date/surface), AT (time/point) — visualize a calendar (on) and a clock (at)
- BECAUSE vs ALTHOUGH: BECAUSE = reason/cause (answer 'why'). ALTHOUGH = contrast/surprise (but still true). Think: Because explains, Although contradicts.
- PREPOSITION + -ING: After IN, OF, FOR, BY, ABOUT, WITHOUT — always add -ing to the verb. Mnemonic: IOFBAW + -ing
- PERFECT = RECENT: Present perfect (has/have + past participle) = something recent or still relevant. Simple past = finished, specific time
🎯 AGNIVEER VAYU exam tips
- Agniveer FIB questions appear in 5-10 minute window. Read the full sentence before choosing — context is hidden in surrounding words, not just the blank.
- Grammar blanks (tenses, articles, prepositions) are 60% of FIB section. Vocabulary is 40%. Prioritize grammar accuracy.
- Recent papers show heavy focus on present perfect vs simple past (2-3 questions per paper) and preposition collocations (2-3 questions). Practice these patterns.
- Time pressure is real: Spend max 30-40 seconds per FIB. If unsure, eliminate obviously wrong options and guess. Don't overthink.
- Read options aloud mentally if stuck — sometimes the wrong option sounds awkward. Your ear catches errors your brain misses under time pressure.
Q1 · hard · AI-verified
The officer looked ________ at the recruit who had disobeyed orders during the drill.
- stern
- sternly
- more stern
- sternness
Q2 · hard · AI-verified
The committee, along with its advisors, ________ yet to reach a consensus on the proposed amendment.
- have been
- are
- is
- were
Q3 · medium · AI-verified
Each of the cadets _______ expected to report by 0600 hours.
- have been
- is
- are
- were
Q4 · easy · AI-verified
Neither the captain nor the soldiers _____ present at the briefing.
- are
- is
- were
- was
Q5 · medium · AI-verified
By the time the reinforcements arrived, the squad _______ already completed the mission.
- had
- was
- has
- have