Examkin

Soru

Zorluk: OrtaVerbs, Tenses, and Aspect

Complete the sentence below by supplying the grammatically correct form of the verb in the blank space.

Cevap:The safety officer instructed the technicians to inspect the emergency valves daily lest the cooling system 【fail】 during peak operations.

Cevap

The correct form to fill the blank is 'fail' or 'should fail'.
The conjunction 'lest' (meaning 'for fear that' or 'to avoid the risk of') requires either the present subjunctive form (the bare infinitive 'fail') or 'should' followed by the bare infinitive ('should fail'). Present indicative, past indicative, or alternative future modals are grammatically invalid in this construction.

Adım Adım Çözüm

1
Identify the conjunction introducing the subordinate clause.
The subordinate clause is introduced by the conjunction 'lest', which expresses a precaution against an undesirable event.
The conjunction 'lest' dictates specific rules of mood and modal usage in English grammar.
2
Apply the verb form rule governing clauses introduced by 'lest'.
In formal English grammar, 'lest' requires the present subjunctive mood (the bare infinitive form 'fail') or the modal auxiliary 'should' combined with the bare infinitive ('should fail').
Standard indicative forms (such as 'fails', 'failed', or 'will fail') cannot be used in a clause introduced by 'lest'.

Anahtar Kavram

Subjunctive mood after 'lest'
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Konular

Verbs, Tenses, and Aspect

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