Question

After they _________ (eat) the shellfish, they began to feel sick. (Past Perfect)

Answer 1

The completed sentence with past perfect tense is as follows:

After they had eaten the shellfish, they began to feel sick.

Past Perfect tense:

• According to the past perfect tense, an action was finished before another action occurred in the past.
• The past tense of the verb "to have" and the past participle of the main verb are combined to generate the past perfect.
• The past perfect tense indicates that one event occurred before to another event in the past when it is used.
• The past perfect is a mix of past tense and perfect aspect, which is indicated by the use of the had auxiliary with the past participle (marked by the use of the past tense of that auxiliary, had).
• Had + [past participle] is the syntax for the past perfect tense.
• The formula remains the same whether the topic is solo or plural.

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Answer 2

Answer:

The Past Perfect form of the verb given in the bracket would be

Had eaten.

i.e. After they had eaten the shellfish, they began to feel sick.

Explanation:

• Past Perfect Tense, most often spelt as pluperfect tense in English grammar is a verb tense relating to an action that was finished before another action happened in the past.

• The past perfect tense is the composition of the past tense of "to have" and the past participle of the root verb. i.e. Had + [past participle form of the main verb]

• Thus, past perfect is a verb tense used to talk about actions that were completed before some point in the past i.e. for speaking about something that happened before something else.

• This tense form is beneficial while talking about some point in the past and wanting to refer to an event that happened even earlier.

• It is used to convey the sequence/series of the events clearer and more specific.

• This is important to keep in mind that the formula for past perfect doesn’t change whether the subject is singular or plural.  

Thus the sentence can be written in the past perfect tense form as follows-

After they had eaten the shellfish, they began to feel sick.

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