AFTER BE, USE THE PRESENT PARTICIPLE OR THE PAST
PARTICIPLE.
The verb be in any of it is form (am, is, are, was, were, be, been, being) can be
followed by another verb. This verb should be in the present participle or the past
participle.
Examples:
Correct sentences.
We are working at home
The homework was done early.
The book was taking by him
Juan is taking the book
Incorrect sentences.
We are work at home.
The homework was do early.
The book was taken by him
Juan is take the book
They were studying too much.