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Question

Difficulty: MediumVerbs, Tenses, and Aspect

Complete the sentence below by supplying the grammatically correct form of the verb 'clear' in the blank to complete the sentence with the appropriate tense and aspect.

Answer:By the time the lead archaeologist arrived at the excavation site, the junior researchers 【had cleared】 the ancient artifacts from the main chamber.

Answer

had cleared
The past perfect form 'had cleared' is required because the sentence describes an action completed prior to another past point in time ('arrived'). The prepositional time phrase 'by the time' paired with a simple past tense verb in the time clause necessitates the past perfect aspect in the main clause.

Step-by-Step Solution

1
Identify the past time reference in the dependent clause.
The clause 'By the time the lead archaeologist arrived' establishes a past reference point using the simple past verb 'arrived'.
Identifying the temporal anchor is necessary to establish correct sequence of tenses.
2
Determine the relationship between the two past actions.
The action in the main clause (moving the artifacts) was completed before the arrival of the archaeologist.
An action that occurred and finished prior to another past event requires the past perfect aspect.
3
Conjugate the verb 'clear' into the past perfect tense.
'had cleared'
Combining the past auxiliary 'had' with the past participle 'cleared' forms the past perfect structure.

Key Concept

Past Perfect Aspect in Time Clauses
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Topics

Verbs, Tenses, and Aspect

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