Tense

V1: base form (go, eat, write)
V2: past form (went, ate, wrote)
V3: past participle (gone, eaten, written)

Tense shows the time of an action or event. It indicates whether the action is in the past, present, or future.

There are three main tenses:

Tense	Structure	Example
Present Simple	Subject + V1 (+s/es)	She writes a letter.
Present Continuous	Subject + is/am/are + V1+ing	She is writing a letter.
Present Perfect	Subject + has/have + V3	She has written a letter.
Present Perfect Continuous	Subject + has/have been + V1+ing	She has been writing a letter.
Past Simple	Subject + V2	She wrote a letter.
Past Continuous	Subject + was/were + V1+ing	She was writing a letter.
Past Perfect	Subject + had + V3	She had written a letter.
Past Perfect Continuous	Subject + had been + V1+ing	She had been writing a letter.
Future Simple	Subject + will + V1	She will write a letter.
Future Continuous	Subject + will be + V1+ing	She will be writing a letter.
Future Perfect	Subject + will have + V3	She will have written a letter.
Future Perfect Continuous	Subject + will have been + V1+ing	She will have been writing a letter.