I can limp you can limp he can limp we can limp you can limp they can limp
V-ing form
I can be limping you can be limping he can be limping we can be limping you can be limping they can be limping
Perfect
I can have limped you can have limped he can have limped we can have limped you can have limped they can have limped
V-ing perfect
I can have been limping you can have been limping he can have been limping we can have been limping you can have been limping they can have been limping
Negation
Simple form
I cannot limp you cannot limp he cannot limp we cannot limp you cannot limp they cannot limp
V-ing form
I cannot be limping you cannot be limping he cannot be limping we cannot be limping you cannot be limping they cannot be limping
Perfect
I cannot have limped you cannot have limped he cannot have limped we cannot have limped you cannot have limped they cannot have limped
V-ing perfect
I cannot have been limping you cannot have been limping he cannot have been limping we cannot have been limping you cannot have been limping they cannot have been limping
Interrogative form
Simple form
can I limp? can you limp? can he limp? can we limp? can you limp? can they limp?
V-ing form
can I be limping? can you be limping? can he be limping? can we be limping? can you be limping? can they be limping?
Perfect
can I have limped? can you have limped? can he have limped? can we have limped? can you have limped? can they have limped?
V-ing perfect
can I have been limping? can you have been limping? can he have been limping? can we have been limping? can you have been limping? can they have been limping?
Interro-negative form
Simple form
can I not limp? can you not limp? can he not limp? can we not limp? can you not limp? can they not limp?
V-ing form
can I not be limping? can you not be limping? can he not be limping? can we not be limping? can you not be limping? can they not be limping?
Perfect
can I not have limped? can you not have limped? can he not have limped? can we not have limped? can you not have limped? can they not have limped?
V-ing perfect
can I not have been limping? can you not have been limping? can he not have been limping? can we not have been limping? can you not have been limping? can they not have been limping?