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Question

Difficulty: MediumVerbs, Tenses, and Aspect

Complete the sentence below by supplying the grammatically correct form of the verb 'realize'.

Answer:Had the presiding judge 【realized】 that the key testimony was fabricated, he would have declared a mistrial immediately.

Answer

realized (or realised)
The sentence features an inverted third conditional construction where 'if' is omitted and the auxiliary verb 'had' is inverted with the subject 'the presiding judge'. To form the past perfect verb phrase required in this clause, 'had' must be paired with the past participle 'realized' (or 'realised'). This correctly pairs with the past modal perfect in the main clause ('would have declared').

Step-by-Step Solution

1
Analyze the sentence structure and clause relationships.
The sentence opens with an inverted conditional clause ('Had the presiding judge...'), followed by a main clause in the past conditional ('would have declared').
This structural pattern represents an inverted third conditional sentence expressing an unreal or unfulfilled past condition.
2
Determine the appropriate auxiliary and verb form required for the past inverted conditional structure.
In inverted third conditional clauses without 'if', the auxiliary verb 'had' precedes the subject, requiring the main verb to take its past participle form.
The compound structure formed by 'Had' + subject + past participle creates the past perfect tense required in hypothetical past condition clauses.
3
Conjugate the verb 'realize' to its past participle form.
The past participle form of 'realize' is 'realized' (or British spelling 'realised').
Filling in 'realized' completes the past perfect aspect correctly to match the perfect conditional result clause ('would have declared').

Key Concept

Inverted Third Conditional and Past Perfect Aspect
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Topics

Verbs, Tenses, and Aspect

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