I have been writing a letter.
I has written a letter.
I had written a letter.
I have written a letter.
Answer is Right!
Answer is Wrong!
The correct answer is D. “I have written a letter.”
The other options are incorrect because they do not agree with the tense of the sentence. The sentence is in the simple past tense, so the verb must also be in the simple past tense.
- “I have been writing a letter” is in the present perfect progressive tense. This tense is used to talk about an action that started in the past and continues to the present.
- “I has written a letter” is incorrect. The verb “to write” takes the third person singular form “writes” when it is used with a singular subject.
- “I had written a letter” is in the past perfect tense. This tense is used to talk about an action that happened before another action in the past.
In this case, the action of writing the letter is the only action that is mentioned, so there is no need to use a past perfect tense. The simple past tense is the most concise and accurate way to express this action.