Answer:
The given sentence "I have finished my assignment" is in the present perfect tense. To change it to the past perfect tense, we need to indicate that the action of finishing the assignment had already taken place before another past event.
The past perfect tense is formed by using the auxiliary verb "had" followed by the past participle of the main verb. In this case, the past participle of "finish" is "finished."
So, to change the given sentence to the past perfect tense, we would say:
"I had finished my assignment."
This sentence indicates that the action of finishing the assignment occurred before a specific past event or time in the past.
For example: "When my teacher checked my work, I had already finished my assignment."
In this example, the action of finishing the assignment (had finished) happened before the teacher checked the work (past event).
Remember, the past perfect tense is used to show that one action happened before another action or a specific time in the past.
Step-by-step explanation:
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