I can pull you can pull she can pull we can pull you can pull they can pull
V-ing form
I can be pulling you can be pulling she can be pulling we can be pulling you can be pulling they can be pulling
Perfect
I can have pulled you can have pulled she can have pulled we can have pulled you can have pulled they can have pulled
V-ing perfect
I can have been pulling you can have been pulling she can have been pulling we can have been pulling you can have been pulling they can have been pulling
Negation
Simple form
I cannot pull you cannot pull she cannot pull we cannot pull you cannot pull they cannot pull
V-ing form
I cannot be pulling you cannot be pulling she cannot be pulling we cannot be pulling you cannot be pulling they cannot be pulling
Perfect
I cannot have pulled you cannot have pulled she cannot have pulled we cannot have pulled you cannot have pulled they cannot have pulled
V-ing perfect
I cannot have been pulling you cannot have been pulling she cannot have been pulling we cannot have been pulling you cannot have been pulling they cannot have been pulling
Interrogative form
Simple form
can I pull? can you pull? can she pull? can we pull? can you pull? can they pull?
V-ing form
can I be pulling? can you be pulling? can she be pulling? can we be pulling? can you be pulling? can they be pulling?
Perfect
can I have pulled? can you have pulled? can she have pulled? can we have pulled? can you have pulled? can they have pulled?
V-ing perfect
can I have been pulling? can you have been pulling? can she have been pulling? can we have been pulling? can you have been pulling? can they have been pulling?
Interro-negative form
Simple form
can I not pull? can you not pull? can she not pull? can we not pull? can you not pull? can they not pull?
V-ing form
can I not be pulling? can you not be pulling? can she not be pulling? can we not be pulling? can you not be pulling? can they not be pulling?
Perfect
can I not have pulled? can you not have pulled? can she not have pulled? can we not have pulled? can you not have pulled? can they not have pulled?
V-ing perfect
can I not have been pulling? can you not have been pulling? can she not have been pulling? can we not have been pulling? can you not have been pulling? can they not have been pulling?