English verb conjugation
CAN HAMMER

Regular verb: hammer - hammered - hammered

Affirmation

Simple form	V-ing form
I can hammer you can hammer she can hammer we can hammer you can hammer they can hammer	I can be hammering you can be hammering she can be hammering we can be hammering you can be hammering they can be hammering
Perfect	V-ing perfect
I can have hammered you can have hammered she can have hammered we can have hammered you can have hammered they can have hammered	I can have been hammering you can have been hammering she can have been hammering we can have been hammering you can have been hammering they can have been hammering

Negation

Simple form	V-ing form
I cannot hammer you cannot hammer she cannot hammer we cannot hammer you cannot hammer they cannot hammer	I cannot be hammering you cannot be hammering she cannot be hammering we cannot be hammering you cannot be hammering they cannot be hammering
Perfect	V-ing perfect
I cannot have hammered you cannot have hammered she cannot have hammered we cannot have hammered you cannot have hammered they cannot have hammered	I cannot have been hammering you cannot have been hammering she cannot have been hammering we cannot have been hammering you cannot have been hammering they cannot have been hammering

Interrogative form

Simple form	V-ing form
can I hammer? can you hammer? can she hammer? can we hammer? can you hammer? can they hammer?	can I be hammering? can you be hammering? can she be hammering? can we be hammering? can you be hammering? can they be hammering?
Perfect	V-ing perfect
can I have hammered? can you have hammered? can she have hammered? can we have hammered? can you have hammered? can they have hammered?	can I have been hammering? can you have been hammering? can she have been hammering? can we have been hammering? can you have been hammering? can they have been hammering?

Interro-negative form

Simple form	V-ing form
can I not hammer? can you not hammer? can she not hammer? can we not hammer? can you not hammer? can they not hammer?	can I not be hammering? can you not be hammering? can she not be hammering? can we not be hammering? can you not be hammering? can they not be hammering?
Perfect	V-ing perfect
can I not have hammered? can you not have hammered? can she not have hammered? can we not have hammered? can you not have hammered? can they not have hammered?	can I not have been hammering? can you not have been hammering? can she not have been hammering? can we not have been hammering? can you not have been hammering? can they not have been hammering?