Question

Difficulty: EasyVerbs, Tenses, and Aspect

Complete the following sentence by filling in the blank with the correct verb form to complete the past perfect tense construction.

Answer:By the time the seminar ended yesterday, the guest speaker 【had answered】 all the questions raised by the participants.

Answer

had answered
The past perfect form 'had answered' correctly indicates an action completed prior to another past action marked by 'ended'.

Step-by-Step Solution

1
Identify the relationship between the two past actions in the sentence
The sentence presents two events in the past: the seminar ending and the speaker addressing the questions.
The time expression 'By the time' indicates that one past action was completed prior to another past event.
2
Apply the appropriate verb tense and aspect
Combine the auxiliary verb 'had' with the past participle form of the main verb to form 'had answered' (or 'had addressed').
The past perfect tense is required to show an action completed before a specified past reference point ('ended').

Key Concept

Past Perfect Tense Aspect in Sequence of Past Events
Estimated Time:45s
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