I can pull you can pull he can pull we can pull you can pull they can pull
V-ing form
I can be pulling you can be pulling he can be pulling we can be pulling you can be pulling they can be pulling
Perfect
I can have pulled you can have pulled he 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 he can have been pulling we can have been pulling you can have been pulling they can have been pulling
Negation
Simple form
I can't pull you can't pull he can't pull we can't pull you can't pull they can't pull
V-ing form
I can't be pulling you can't be pulling he can't be pulling we can't be pulling you can't be pulling they can't be pulling
Perfect
I can't have pulled you can't have pulled he can't have pulled we can't have pulled you can't have pulled they can't have pulled
V-ing perfect
I can't have been pulling you can't have been pulling he can't have been pulling we can't have been pulling you can't have been pulling they can't have been pulling
Interrogative form
Simple form
can I pull? can you pull? can he pull? can we pull? can you pull? can they pull?
V-ing form
can I be pulling? can you be pulling? can he be pulling? can we be pulling? can you be pulling? can they be pulling?
Perfect
can I have pulled? can you have pulled? can he 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 he have been pulling? can we have been pulling? can you have been pulling? can they have been pulling?
Interro-negative form
Simple form
can't I pull? can't you pull? can't he pull? can't we pull? can't you pull? can't they pull?
V-ing form
can't I be pulling? can't you be pulling? can't he be pulling? can't we be pulling? can't you be pulling? can't they be pulling?
Perfect
can't I have pulled? can't you have pulled? can't he have pulled? can't we have pulled? can't you have pulled? can't they have pulled?
V-ing perfect
can't I have been pulling? can't you have been pulling? can't he have been pulling? can't we have been pulling? can't you have been pulling? can't they have been pulling?