I can lap you can lap he can lap we can lap you can lap they can lap
V-ing form
I can be lapping you can be lapping he can be lapping we can be lapping you can be lapping they can be lapping
Perfect
I can have lapped you can have lapped he can have lapped we can have lapped you can have lapped they can have lapped
V-ing perfect
I can have been lapping you can have been lapping he can have been lapping we can have been lapping you can have been lapping they can have been lapping
Negation
Simple form
I cannot lap you cannot lap he cannot lap we cannot lap you cannot lap they cannot lap
V-ing form
I cannot be lapping you cannot be lapping he cannot be lapping we cannot be lapping you cannot be lapping they cannot be lapping
Perfect
I cannot have lapped you cannot have lapped he cannot have lapped we cannot have lapped you cannot have lapped they cannot have lapped
V-ing perfect
I cannot have been lapping you cannot have been lapping he cannot have been lapping we cannot have been lapping you cannot have been lapping they cannot have been lapping
Interrogative form
Simple form
can I lap? can you lap? can he lap? can we lap? can you lap? can they lap?
V-ing form
can I be lapping? can you be lapping? can he be lapping? can we be lapping? can you be lapping? can they be lapping?
Perfect
can I have lapped? can you have lapped? can he have lapped? can we have lapped? can you have lapped? can they have lapped?
V-ing perfect
can I have been lapping? can you have been lapping? can he have been lapping? can we have been lapping? can you have been lapping? can they have been lapping?
Interro-negative form
Simple form
can I not lap? can you not lap? can he not lap? can we not lap? can you not lap? can they not lap?
V-ing form
can I not be lapping? can you not be lapping? can he not be lapping? can we not be lapping? can you not be lapping? can they not be lapping?
Perfect
can I not have lapped? can you not have lapped? can he not have lapped? can we not have lapped? can you not have lapped? can they not have lapped?
V-ing perfect
can I not have been lapping? can you not have been lapping? can he not have been lapping? can we not have been lapping? can you not have been lapping? can they not have been lapping?