hadn't

The boy hadn't finished his homework before dinner.

Definition

1. Contraction:
   • Negative past perfect auxiliary: "hadn't" is the contracted form of "had not," used as an auxiliary verb to form the negative past perfect tense. It indicates that an action was not completed before a certain point in the past.

Usage Instructions

• "Hadn't" must be followed by a past participle to form the past perfect tense.
• It is used in negative statements and questions (inverted order).
• It is informal or neutral in tone, common in spoken and written English.

Usage Examples

• (She had not completed the assignment before the telephone call.)
• (They had not watched that film prior to the previous evening.)
• (Had you not already consumed food at the time of her arrival?)

Advanced Usage

• In conditional sentences: "Hadn't" can be used in inverted conditional clauses (without "if") to express a past unreal condition.
  • Hadn't it rained, we would have gone to the beach. (If it had not rained, we would have gone to the beach.)
• In reported speech: "Hadn't" remains unchanged when converting direct speech to past tense.
  • Direct: He said, "I hadn't seen her." → Reported: He said he hadn't seen her.

Variants and Related Words

• Had not (full form): the uncontracted version, used in formal writing or for emphasis.
  • I had not realized the time. (The full form of "hadn't" in a formal sentence.)
• Hasn't (contraction): negative present perfect auxiliary for third-person singular.
  • She hasn't arrived yet. (She has not arrived.)

Synonyms

• Had not: the full form, with no difference in meaning.
• Did not have: in some contexts, "hadn't" can be replaced by "didn't have" when "had" is a main verb (not auxiliary).
  • I hadn't a clue. → I didn't have a clue. (Equivalent meaning, but "hadn't" here is less common.)

Phrasal Verbs

• (none applicable): "Hadn't" is an auxiliary contraction and does not form phrasal verbs.

Related Idioms

• Hadn't better: a fixed expression used to give strong advice or warnings.
  • You hadn't better be late again. (It would be unwise for you to be late.)
• Hadn't the heart: used to say one could not do something because it would be too unkind.
  • I hadn't the heart to tell him the bad news. (I could not bring myself to inform him.)

Related Idioms

• Hadn't a clue: to be completely ignorant or uninformed about something.
  • He hadn't a clue how to fix the car. (He had no idea about repairing the vehicle.)