To be, To do, To have - As main verbs and helping verbs

To be, To do, To have

	V1 Present	V2 Past	V3 Past Participle	V4 Continuous form
To be	Am,  is, are	Was were	been	being
To do	Do, does	did	did	doing
To have	Have, has	had	had	having

    These verbs (To be, To do, To have) are used in their different forms as main verbs and helping verbs also at different situations as shown in the above table.

    To be, To do and To have are the most important verbs in the English Language. These verbs are used differently as main verb and helping verb at different situation. Lets see the usage of the verbs.

1. To be : 

    This verb is used as main to show Existance/state, quality, relation, profession, etc. in other hand same verb is used as helping verb also.

e.g.

1. I am at home. (Main Verb)
2. He is playing football.(Helping Verb)

See also : Usage of Verb To be.

2. To do:

    This verb is used as main verb to show an action in other hand same verb is used as helping verb also.

e.g.

1. I did my homework. (Main Verb)
2. He did not write letter.(Helping Verb)

See also : Usage of Verb To do.

3. To have:

    This verb is used to show possession or ownership as main verb in other hand same verb is used as helping verb also.

e.g. 

1. I have a pen.(Main Verb)
2. I have completed my homework. (Helping Verb)

See also : Usage of Verb To have.