I can chop you can chop she can chop we can chop you can chop they can chop
V-ing form
I can be chopping you can be chopping she can be chopping we can be chopping you can be chopping they can be chopping
Perfect
I can have chopped you can have chopped she can have chopped we can have chopped you can have chopped they can have chopped
V-ing perfect
I can have been chopping you can have been chopping she can have been chopping we can have been chopping you can have been chopping they can have been chopping
Negation
Simple form
I cannot chop you cannot chop she cannot chop we cannot chop you cannot chop they cannot chop
V-ing form
I cannot be chopping you cannot be chopping she cannot be chopping we cannot be chopping you cannot be chopping they cannot be chopping
Perfect
I cannot have chopped you cannot have chopped she cannot have chopped we cannot have chopped you cannot have chopped they cannot have chopped
V-ing perfect
I cannot have been chopping you cannot have been chopping she cannot have been chopping we cannot have been chopping you cannot have been chopping they cannot have been chopping
Interrogative form
Simple form
can I chop? can you chop? can she chop? can we chop? can you chop? can they chop?
V-ing form
can I be chopping? can you be chopping? can she be chopping? can we be chopping? can you be chopping? can they be chopping?
Perfect
can I have chopped? can you have chopped? can she have chopped? can we have chopped? can you have chopped? can they have chopped?
V-ing perfect
can I have been chopping? can you have been chopping? can she have been chopping? can we have been chopping? can you have been chopping? can they have been chopping?
Interro-negative form
Simple form
can I not chop? can you not chop? can she not chop? can we not chop? can you not chop? can they not chop?
V-ing form
can I not be chopping? can you not be chopping? can she not be chopping? can we not be chopping? can you not be chopping? can they not be chopping?
Perfect
can I not have chopped? can you not have chopped? can she not have chopped? can we not have chopped? can you not have chopped? can they not have chopped?
V-ing perfect
can I not have been chopping? can you not have been chopping? can she not have been chopping? can we not have been chopping? can you not have been chopping? can they not have been chopping?