1. Verb Tense
Tense denotes the time of the action indicated by a verb. The time is not always the same as that indicated by the name of the tense.

2. 6 Types

3. Present Tense
Present tense may express action which is going on at the present time or which occurs always, repeatedly, or habitually.
Examples: He sees the train. He eats cereal for breakfast every day.

4. Past Tense
Past tense expresses action completed at a definite time in the past.
Examples: He wrote the letter yesterday. She lived to be 90 years old.

5. Future Tense
Future tense expresses action which will take place in the future.
It uses the helping verbs will or shall* and the present tense form of the verb).
Examples: He will send the letter tomorrow. I shall wait here until you return.
* Traditionally, shall is used for 1st person and will for 2nd and 3rd persons.

6. Present Perfect Tense
Present perfect tense expresses action completed at the present time (perfect means complete) or begun in the past and continuing into the present.
This tense uses the helping verbs has and have and the past participle of the verb.
Examples:
He has written a letter to his uncle. (completed action)
The Waltons have lived here for seven years. (continuing)

7. Past Perfect Tense
Past perfect tense expresses action completed before certain time in the past. (This is the before-past tense.)
It uses the helping verb had and the past participle of the verb.
Example: She had written the letter before I saw her.

8. Future Perfect Tense
Future perfect tense expresses action which will be completed before a certain time in the future. (This is the before-future tense)
It uses the helping verbs will have or shall have and the past participle of the verb.
Example: He will have finished the paper before next Friday.

9. Verb Forms

10. Four Principal/Main Parts
Principal Parts:
Verb:
Present Tense
Present Participle
Past Tense
Past Participle
To Be
be, am, are, is
being
was, were
(have) been
To Have
have, has
having
had
(have) had

11. Conjugation of the verb: to be
Tense
Singular
Plural
Present
I am
You are
He, she, it is
We are
They are
Past
I was
You were
He was
We were
They were
Future
I shall be
You will be
He will be
We shall be
They will be
Present Perfect
I have been
You have been
He has been
We have been
They have been
Past Perfect
I had been
You had been
He had been
We had been
They had been
Future Perfect
I shall have been
You will have been
He will have been
We shall have been
They will have been