English verb conjugation
COULD IMPRESS

Regular verb: impress - impressed - impressed

Affirmation

Simple form	V-ing form
I could impress you could impress he could impress we could impress you could impress they could impress	I could be impressing you could be impressing he could be impressing we could be impressing you could be impressing they could be impressing
Perfect	V-ing perfect
I could have impressed you could have impressed he 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 he 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
I could not impress you could not impress he could not impress we could not impress you could not impress they could not impress	I could not be impressing you could not be impressing he could not be impressing we could not be impressing you could not be impressing they could not be impressing
Perfect	V-ing perfect
I could not have impressed you could not have impressed he could not have impressed we could not have impressed you could not have impressed they could not have impressed	I could not have been impressing you could not have been impressing he could not have been impressing we could not have been impressing you could not have been impressing they could not have been impressing

Interrogative form

Simple form	V-ing form
could I impress? could you impress? could he impress? could we impress? could you impress? could they impress?	could I be impressing? could you be impressing? could he be impressing? could we be impressing? could you be impressing? could they be impressing?
Perfect	V-ing perfect
could I have impressed? could you have impressed? could he 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 he 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
could I not impress? could you not impress? could he not impress? could we not impress? could you not impress? could they not impress?	could I not be impressing? could you not be impressing? could he not be impressing? could we not be impressing? could you not be impressing? could they not be impressing?
Perfect	V-ing perfect
could I not have impressed? could you not have impressed? could he not have impressed? could we not have impressed? could you not have impressed? could they not have impressed?	could I not have been impressing? could you not have been impressing? could he not have been impressing? could we not have been impressing? could you not have been impressing? could they not have been impressing?