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 couldn't after you couldn't after he couldn't after we couldn't after you couldn't after they couldn't after	I couldn't be aftering you couldn't be aftering he couldn't be aftering we couldn't be aftering you couldn't be aftering they couldn't be aftering
Perfect	V-ing perfect
I couldn't have aftered you couldn't have aftered he couldn't have aftered we couldn't have aftered you couldn't have aftered they couldn't have aftered	I couldn't have been aftering you couldn't have been aftering he couldn't have been aftering we couldn't have been aftering you couldn't have been aftering they couldn't 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
couldn't I after? couldn't you after? couldn't he after? couldn't we after? couldn't you after? couldn't they after?	couldn't I be aftering? couldn't you be aftering? couldn't he be aftering? couldn't we be aftering? couldn't you be aftering? couldn't they be aftering?
Perfect	V-ing perfect
couldn't I have aftered? couldn't you have aftered? couldn't he have aftered? couldn't we have aftered? couldn't you have aftered? couldn't they have aftered?	couldn't I have been aftering? couldn't you have been aftering? couldn't he have been aftering? couldn't we have been aftering? couldn't you have been aftering? couldn't they have been aftering?