English verb conjugation
COULD COMPLETE

Regular verb: complete - completed - completed

Affirmation

Simple form	V-ing form
I could complete you could complete she could complete we could complete you could complete they could complete	I could be completing you could be completing she could be completing we could be completing you could be completing they could be completing
Perfect	V-ing perfect
I could have completed you could have completed she could have completed we could have completed you could have completed they could have completed	I could have been completing you could have been completing she could have been completing we could have been completing you could have been completing they could have been completing

Negation

Simple form	V-ing form
I could not complete you could not complete she could not complete we could not complete you could not complete they could not complete	I could not be completing you could not be completing she could not be completing we could not be completing you could not be completing they could not be completing
Perfect	V-ing perfect
I could not have completed you could not have completed she could not have completed we could not have completed you could not have completed they could not have completed	I could not have been completing you could not have been completing she could not have been completing we could not have been completing you could not have been completing they could not have been completing

Interrogative form

Simple form	V-ing form
could I complete? could you complete? could she complete? could we complete? could you complete? could they complete?	could I be completing? could you be completing? could she be completing? could we be completing? could you be completing? could they be completing?
Perfect	V-ing perfect
could I have completed? could you have completed? could she have completed? could we have completed? could you have completed? could they have completed?	could I have been completing? could you have been completing? could she have been completing? could we have been completing? could you have been completing? could they have been completing?

Interro-negative form

Simple form	V-ing form
could I not complete? could you not complete? could she not complete? could we not complete? could you not complete? could they not complete?	could I not be completing? could you not be completing? could she not be completing? could we not be completing? could you not be completing? could they not be completing?
Perfect	V-ing perfect
could I not have completed? could you not have completed? could she not have completed? could we not have completed? could you not have completed? could they not have completed?	could I not have been completing? could you not have been completing? could she not have been completing? could we not have been completing? could you not have been completing? could they not have been completing?