Simple Future or Future Indefinite Tense

Affirmative
I will/shall write.
He will/shall write.
They will/shall write.

Negative
I will/shall not write.
He will/shall not write.
They will/shall not write.

The Past Perfect Tense

Affirmative
I had worked.
She had worked.
They/you/we had worked.

Negative
I had not worked.
She had not worked.
They/you/we had not worked.

The Simple Past or Past Indefinite Tense

Affirmative

I wrote.
She wrote.
They/you/we wrote.

Negative

I didn’t write.
She didn’t write.
They/you/we didn’t write.

Interrogative

Present Perfect Tense

Form
Affirmative
I have written.
He has written.
They/you/we have written.

Negative
I have not written.
She has not written.
They/you/we have not written.

The present indefinite or the simple present

Form:
Affirmative

I work.
She works.
They/you work.

Negative

I don’t work.
She doesn’t work.
They/you don’t work.

Interrogative

We have seen that the past perfect tense is used to talk about a completed past action. Note that when two past actions have to be mentioned, the past perfect is used for the earlier of the two, and the simple past for the later.