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Question

Difficulty: MediumVerbs, Tenses, and Aspect

Complete the sentence by filling in the blank with the grammatically correct word to complete the conditional structure.

Answer:【Had】 the oversight committee inspected the construction site before the heavy rains, the structural defect would have been discovered in time.

Answer

Had
The correct auxiliary to fill the blank is 'Had'. In formal English, omitting the conditional conjunction 'if' in a third conditional sentence requires subject-auxiliary inversion, placing the auxiliary verb 'Had' at the beginning of the clause before the subject ('the oversight committee').

Step-by-Step Solution

1
Analyze the main clause structure and conditional tense requirements.
The main clause 'the structural defect would have been discovered in time' uses a perfect conditional form ('would have + past participle'), indicating an unfulfilled past condition (third conditional).
A third conditional sentence requires a past perfect verb form in the conditional clause to express a hypothetical situation in the past.
2
Identify the rules for inverted conditional clauses in formal English.
When the conjunction 'if' is omitted from a third conditional clause, subject-auxiliary inversion must occur, placing the past perfect auxiliary verb 'Had' at the sentence onset before the subject ('the oversight committee').
The formal structure 'Had + subject + past participle' is grammatically equivalent to 'If + subject + had + past participle'.

Key Concept

Inverted Third Conditional (Unreal Past Condition)
Estimated Time:1m 0s
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Topics

Verbs, Tenses, and Aspect

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