English verb conjugation
COULD PUNCH

Regular verb: punch - punched - punched

Affirmation

Simple form	V-ing form
I could punch you could punch she could punch we could punch you could punch they could punch	I could be punching you could be punching she could be punching we could be punching you could be punching they could be punching
Perfect	V-ing perfect
I could have punched you could have punched she could have punched we could have punched you could have punched they could have punched	I could have been punching you could have been punching she could have been punching we could have been punching you could have been punching they could have been punching

Negation

Simple form	V-ing form
I could not punch you could not punch she could not punch we could not punch you could not punch they could not punch	I could not be punching you could not be punching she could not be punching we could not be punching you could not be punching they could not be punching
Perfect	V-ing perfect
I could not have punched you could not have punched she could not have punched we could not have punched you could not have punched they could not have punched	I could not have been punching you could not have been punching she could not have been punching we could not have been punching you could not have been punching they could not have been punching

Interrogative form

Simple form	V-ing form
could I punch? could you punch? could she punch? could we punch? could you punch? could they punch?	could I be punching? could you be punching? could she be punching? could we be punching? could you be punching? could they be punching?
Perfect	V-ing perfect
could I have punched? could you have punched? could she have punched? could we have punched? could you have punched? could they have punched?	could I have been punching? could you have been punching? could she have been punching? could we have been punching? could you have been punching? could they have been punching?

Interro-negative form

Simple form	V-ing form
could I not punch? could you not punch? could she not punch? could we not punch? could you not punch? could they not punch?	could I not be punching? could you not be punching? could she not be punching? could we not be punching? could you not be punching? could they not be punching?
Perfect	V-ing perfect
could I not have punched? could you not have punched? could she not have punched? could we not have punched? could you not have punched? could they not have punched?	could I not have been punching? could you not have been punching? could she not have been punching? could we not have been punching? could you not have been punching? could they not have been punching?