Past perfect tense :-

Past perfect tense :-

The past perfect tense is used to describe an action that took place before another action in the past. It is formed by using "had" followed by the past participle of the main verb. For example, "She had already finished her work when he arrived." In this sentence, "had finished" is in the past perfect tense, indicating that the action of finishing occurred before the arrival of "he."

Sure, here are examples of the past perfect tense in positive, negative, and question sentences:

1. Positive:

   - She had completed the project before the deadline.

   - They had visited the museum last week.

   - He had already eaten dinner when I called.

2. Negative:

   - She had not finished her homework by 8 PM.

   - They had not traveled to Europe before last summer.

   - He had not read the book before the class.

3. Question:

   - Had she seen that movie before?

   - Had they ever been to Paris?

   - Had he received the email by noon?

These examples show how the past perfect tense can be used in various sentence forms.