Please finish describing the present perfect tense, what is the past perfect tense

The past perfect tense is a cover-up tense in English used to indicate an action or state that has been completed before a certain point in time or action in the past. It is often used in conjunction with the past tense to emphasize the precedence before a certain point in the past.

The past perfect tense is formed by auxiliary verbs"had"+ Past participle composition. For example:

Affirmative Sentence: Subject + Had + Past Participle.

Example sentence: He had already finished his homework before dinner(He's done his homework before dinner.) ）

Negative sentence: subject + had not + past participle.

Example sentence: I had not seen that movie before yesterday(I hadn't seen that movie before yesterday.) ）

Interrogative sentence: had + subject + past participle?

Example sentence: had they arrived at the airport before the flight took off?(Did they get to the airport before the plane took off?) ）

The past perfect tense is commonly used in the following situations:

Indicates an action or state that has been completed before a point in the past.

In past narratives, it was used to express events that occurred one after another.

It is used as the main clause in a conditional sentence to express an assumption or speculation about a point in time in the past.

It is important to note that the past perfect tense is usually used while narrating past events or situations, so it is important to decide whether the past perfect tense needs to be used or not depending on the specific context and sentence structure.

Question 1 – Can you tell me the correct answer?

Sorry, I didn't hear that. Can you repeat it again?

The questioner is the one who asks the question before "Can you tell me the answer", which is something that happened in the past and was not heard, so the past perfect tense is used. And item B is right for now.

Question 2 The same goes — Edward, you talk so well that I never knew you could play the piano.

The questioner said that he didn't know after Edward played the piano and was a statement of the past past.

Question 3 I have seen your wife, and I have to admit that she is indeed very charming.

This is different from the previous two questions. This is the protagonist who first saw his friend's wife in the past, and now makes a comment. Because what was seen in the past has an impact on the present, the present perfect tense is used.

Question 4: You should remember that in general, the time that is paired with yet is in the present perfect tense. Translated as "Sunny hasn't come back yet, we're still waiting for her".

Last question: I think I should choose B. should be used do. - I haven't seen you for many years, are you still working in Fuzhou?

Yes, I've been there for two years.

Forehead.. I don't seem to understand 、、、 too much

Hope it helps