I can impress you can impress he can impress we can impress you can impress they can impress
V-ing form
I can be impressing you can be impressing he can be impressing we can be impressing you can be impressing they can be impressing
Perfect
I can have impressed you can have impressed he can have impressed we can have impressed you can have impressed they can have impressed
V-ing perfect
I can have been impressing you can have been impressing he can have been impressing we can have been impressing you can have been impressing they can have been impressing
Negation
Simple form
I cannot impress you cannot impress he cannot impress we cannot impress you cannot impress they cannot impress
V-ing form
I cannot be impressing you cannot be impressing he cannot be impressing we cannot be impressing you cannot be impressing they cannot be impressing
Perfect
I cannot have impressed you cannot have impressed he cannot have impressed we cannot have impressed you cannot have impressed they cannot have impressed
V-ing perfect
I cannot have been impressing you cannot have been impressing he cannot have been impressing we cannot have been impressing you cannot have been impressing they cannot have been impressing
Interrogative form
Simple form
can I impress? can you impress? can he impress? can we impress? can you impress? can they impress?
V-ing form
can I be impressing? can you be impressing? can he be impressing? can we be impressing? can you be impressing? can they be impressing?
Perfect
can I have impressed? can you have impressed? can he have impressed? can we have impressed? can you have impressed? can they have impressed?
V-ing perfect
can I have been impressing? can you have been impressing? can he have been impressing? can we have been impressing? can you have been impressing? can they have been impressing?
Interro-negative form
Simple form
can I not impress? can you not impress? can he not impress? can we not impress? can you not impress? can they not impress?
V-ing form
can I not be impressing? can you not be impressing? can he not be impressing? can we not be impressing? can you not be impressing? can they not be impressing?
Perfect
can I not have impressed? can you not have impressed? can he not have impressed? can we not have impressed? can you not have impressed? can they not have impressed?
V-ing perfect
can I not have been impressing? can you not have been impressing? can he not have been impressing? can we not have been impressing? can you not have been impressing? can they not have been impressing?