could impress
Regular verb: impress - impressed- impressed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could impress
you could impress
she could impress
we could impress
you could impress
they could impress 	I could be impressing
you could be impressing
she could be impressing
we could be impressing
you could be impressing
they could be impressing	I could have impressed
you could have impressed
she could have impressed
we could have impressed
you could have impressed
they could have impressed	I could have been impressing
you could have been impressing
she could have been impressing
we could have been impressing
you could have been impressing
they could have been impressing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't impress
you couldn't impress
she couldn't impress
we couldn't impress
you couldn't impress
they couldn't impress 	I couldn't be impressing
you couldn't be impressing
she couldn't be impressing
we couldn't be impressing
you couldn't be impressing
they couldn't be impressing	I couldn't have impressed
you couldn't have impressed
she couldn't have impressed
we couldn't have impressed
you couldn't have impressed
they couldn't have impressed	I couldn't have been impressing
you couldn't have been impressing
she couldn't have been impressing
we couldn't have been impressing
you couldn't have been impressing
they couldn't have been impressing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I impress?
could you impress?
could she impress?
could we impress?
could you impress?
could they impress? 	could I be impressing?
could you be impressing?
could she be impressing?
could we be impressing?
could you be impressing?
could they be impressing? 	could I have impressed?
could you have impressed?
could she have impressed?
could we have impressed?
could you have impressed?
could they have impressed? 	could I have been impressing?
could you have been impressing?
could she have been impressing?
could we have been impressing?
could you have been impressing?
could they have been impressing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I impress?
couldn't you impress?
couldn't she impress?
couldn't we impress?
couldn't you impress?
couldn't they impress? 	couldn't I be impressing?
couldn't you be impressing?
couldn't she be impressing?
couldn't we be impressing?
couldn't you be impressing?
couldn't they be impressing? 	couldn't I have impressed?
couldn't you have impressed?
couldn't she have impressed?
couldn't we have impressed?
couldn't you have impressed?
couldn't they have impressed? 	couldn't I have been impressing?
couldn't you have been impressing?
couldn't she have been impressing?
couldn't we have been impressing?
couldn't you have been impressing?
couldn't they have been impressing?