English verb conjugation
COULD AFTER

Regular verb: after - aftered - aftered

Affirmation

Simple form	V-ing form
I could after you could after he could after we could after you could after they could after	I could be aftering you could be aftering he could be aftering we could be aftering you could be aftering they could be aftering
Perfect	V-ing perfect
I could have aftered you could have aftered he could have aftered we could have aftered you could have aftered they could have aftered	I could have been aftering you could have been aftering he could have been aftering we could have been aftering you could have been aftering they could have been aftering

Negation

Simple form	V-ing form
I could not after you could not after he could not after we could not after you could not after they could not after	I could not be aftering you could not be aftering he could not be aftering we could not be aftering you could not be aftering they could not be aftering
Perfect	V-ing perfect
I could not have aftered you could not have aftered he could not have aftered we could not have aftered you could not have aftered they could not have aftered	I could not have been aftering you could not have been aftering he could not have been aftering we could not have been aftering you could not have been aftering they could not have been aftering

Interrogative form

Simple form	V-ing form
could I after? could you after? could he after? could we after? could you after? could they after?	could I be aftering? could you be aftering? could he be aftering? could we be aftering? could you be aftering? could they be aftering?
Perfect	V-ing perfect
could I have aftered? could you have aftered? could he have aftered? could we have aftered? could you have aftered? could they have aftered?	could I have been aftering? could you have been aftering? could he have been aftering? could we have been aftering? could you have been aftering? could they have been aftering?

Interro-negative form

Simple form	V-ing form
could I not after? could you not after? could he not after? could we not after? could you not after? could they not after?	could I not be aftering? could you not be aftering? could he not be aftering? could we not be aftering? could you not be aftering? could they not be aftering?
Perfect	V-ing perfect
could I not have aftered? could you not have aftered? could he not have aftered? could we not have aftered? could you not have aftered? could they not have aftered?	could I not have been aftering? could you not have been aftering? could he not have been aftering? could we not have been aftering? could you not have been aftering? could they not have been aftering?