Grammar and Usage Questions for NDA

Parts of Speech and Their Usage

Every word in a sentence plays a role: noun, pronoun, verb, adjective, adverb, preposition, conjunction, or interjection. NDA questions test whether you can identify wrong usage, for example using an adjective where an adverb is needed, or placing a preposition incorrectly. Think of parts of speech as players in a cricket team, each has a fixed position and job.

• Adjectives describe nouns, adverbs describe verbs, adjectives, or other adverbs. Never swap them.
• Pronouns must agree with their antecedent in number and gender.
• Prepositions are fixed with certain words: interested IN, differ FROM, similar TO, good AT.
• Conjunctions like although, but, however cannot be used together in the same clause.
• Avoid double negatives: 'I did not do nothing' is wrong; use 'I did not do anything'.

Tenses and Subject-Verb Agreement

Tense errors and subject-verb disagreement are the two most tested grammar points in NDA. The rule is simple: singular subject takes singular verb, plural subject takes plural verb. Tricky cases arise with collective nouns, indefinite pronouns, and sentences where the subject is separated from the verb by a phrase. For tenses, consistency matters, do not shift from past to present mid-sentence without reason.

• Collective nouns like team, committee, jury take a singular verb when acting as one unit.
• Indefinite pronouns like everyone, nobody, each, either, neither are always singular.
• Phrases starting with along with, as well as, together with do NOT change the subject number.
• Present Perfect is used for actions with a connection to the present: I have finished my work.
• Simple Past is used for actions completed at a specific time in the past: He left yesterday.
• If two actions happened in the past, the earlier one uses Past Perfect: She had eaten before he arrived.

Articles: A, An, The

Article errors are very common in NDA error-spotting questions. A and An are indefinite articles used for non-specific nouns. An is used before a vowel sound, not just a vowel letter. The is the definite article used for specific or previously mentioned nouns. Certain nouns like names of countries, languages, sports, and meals do not take an article.

• Use An before vowel sounds: an hour, an honest man, an MBA student.
• Use A before consonant sounds: a university, a European, a useful guide.
• The is used before superlatives: the best, the tallest, the only.
• No article before: proper nouns, languages (Hindi, English), sports, meals, and most country names.
• The is used before names of rivers, seas, mountain ranges, and newspapers: the Ganga, the Himalayas, the Hindu.

Active and Passive Voice

NDA regularly asks you to convert sentences from active to passive or spot errors in passive construction. In active voice the subject performs the action. In passive voice the subject receives the action. The key is to keep the tense consistent and use the correct form of 'be' plus the past participle. Sentences with two objects (direct and indirect) can form two passive versions.

• Active: Subject + V1/V2 + Object. Passive: Object + is/was/are/were + V3 + by + Subject.
• Only transitive verbs can be made passive. Intransitive verbs like sleep, die cannot.
• Modal passives: can/could/should/must + be + V3.
• When converting, the tense of 'be' must match the tense of the original verb.
• By + agent is optional; omit it when the doer is unknown or obvious.

Direct and Indirect Speech

Reported speech questions ask you to change a direct quote into indirect speech or spot errors in a converted sentence. The main rules involve changing pronouns, tense backshift, and time expressions. Think of it as sending a message second-hand: you adjust the perspective and time references.

• Reporting verb in past tense triggers tense backshift: is becomes was, has becomes had, will becomes would.
• Pronouns change based on the speaker and listener: I becomes he or she, we becomes they.
• Time words change: now becomes then, today becomes that day, tomorrow becomes the next day.
• Questions use whether or if, not that, and normal subject-verb order: He asked if I was ready.
• Commands use told plus to plus infinitive: She said, 'Sit down' becomes She told him to sit down.
• No tense change if the reporting verb is in present tense or the statement is a universal truth.

Common Error Spotting Areas

Error spotting questions give you a sentence divided into four parts and ask which part has a grammatical error. The most tested areas are: use of comparatives and superlatives, redundancy, misplaced modifiers, and faulty parallelism. Keep an eye on these patterns as they appear in almost every NDA paper.

• Comparative degree is used for two things, superlative for three or more: He is the taller of the two, NOT the tallest.
• Redundancy means saying the same thing twice: return back, repeat again, future plans, past experience are all wrong.
• A modifier must be placed next to the word it describes to avoid confusion.
• Parallelism: items in a list must use the same grammatical form: She likes reading, writing, and to swim is wrong.
• Both, either, neither are used for exactly two items, not three or more.

• Writing 'a European' incorrectly as 'an European' because E looks like a vowel but 'Eu' sounds like 'Yu', a consonant sound.
• Thinking 'along with' changes the subject number. 'Ram along with his friends IS coming' is correct, not are.
• In passive voice, using the wrong helper verb. 'The work is completed' is wrong if you mean past action; it should be 'The work was completed'.
• In reported speech, forgetting to change time expressions like today, tomorrow, now, which must also shift.
• Using 'more better' or 'most tallest', mixing double comparatives or superlatives with already comparative adjectives.

• SAVE for tense backshift in indirect speech: Simple present to Simple past, And has or have to had, Verb future will to would, Everything else shifts one step back.
• PART for preposition collocations: P for Proud OF, A for Angry WITH, R for Responsible FOR, T for Trust IN. Expand this list with similar fixed pairs.
• SOAP test for articles: Specific noun or previously mentioned item gets THE; One unspecified item gets A or AN; All general plural nouns or uncountable nouns get NO article.
• Think of direct speech as a live phone call and indirect speech as a text message sent later. You rephrase everything in your own words and adjust time and person.

• NDA GAT has around 10 to 12 questions on grammar spread across error spotting and sentence improvement. These are fast marks if your rules are sharp. Aim to solve them in under 30 seconds each.
• Error spotting questions in recent NDA papers heavily favour subject-verb agreement with distracting middle phrases, and article misuse. Practice isolating the subject before choosing the verb.
• Active-passive and direct-indirect speech questions usually come in pairs or as part of a set of fill-in-the-blanks. Expect one moderate difficulty question per paper in each category.
• Do not overthink error spotting. Read the sentence aloud mentally. The incorrect part usually sounds wrong to a practiced ear. If two options seem wrong, pick the one with a grammar rule violation, not just awkward phrasing.
• Redundancy questions are free marks. Phrases like revert back, mutual cooperation, past history, or free gift are almost always the trap option and the answer.