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 couldn't impress you couldn't impress he 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 he couldn't be impressing we couldn't be impressing you couldn't be impressing they couldn't be impressing
Perfect	V-ing perfect
I couldn't have impressed you couldn't have impressed he 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 he 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
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
couldn't I impress? couldn't you impress? couldn't he 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 he be impressing? couldn't we be impressing? couldn't you be impressing? couldn't they be impressing?
Perfect	V-ing perfect
couldn't I have impressed? couldn't you have impressed? couldn't he 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 he have been impressing? couldn't we have been impressing? couldn't you have been impressing? couldn't they have been impressing?