English verb conjugation
COULD CONTAIN

Regular verb: contain - contained - contained

Affirmation

Simple form	V-ing form
I could contain you could contain she could contain we could contain you could contain they could contain	I could be containing you could be containing she could be containing we could be containing you could be containing they could be containing
Perfect	V-ing perfect
I could have contained you could have contained she could have contained we could have contained you could have contained they could have contained	I could have been containing you could have been containing she could have been containing we could have been containing you could have been containing they could have been containing

Negation

Simple form	V-ing form
I could not contain you could not contain she could not contain we could not contain you could not contain they could not contain	I could not be containing you could not be containing she could not be containing we could not be containing you could not be containing they could not be containing
Perfect	V-ing perfect
I could not have contained you could not have contained she could not have contained we could not have contained you could not have contained they could not have contained	I could not have been containing you could not have been containing she could not have been containing we could not have been containing you could not have been containing they could not have been containing

Interrogative form

Simple form	V-ing form
could I contain? could you contain? could she contain? could we contain? could you contain? could they contain?	could I be containing? could you be containing? could she be containing? could we be containing? could you be containing? could they be containing?
Perfect	V-ing perfect
could I have contained? could you have contained? could she have contained? could we have contained? could you have contained? could they have contained?	could I have been containing? could you have been containing? could she have been containing? could we have been containing? could you have been containing? could they have been containing?

Interro-negative form

Simple form	V-ing form
could I not contain? could you not contain? could she not contain? could we not contain? could you not contain? could they not contain?	could I not be containing? could you not be containing? could she not be containing? could we not be containing? could you not be containing? could they not be containing?
Perfect	V-ing perfect
could I not have contained? could you not have contained? could she not have contained? could we not have contained? could you not have contained? could they not have contained?	could I not have been containing? could you not have been containing? could she not have been containing? could we not have been containing? could you not have been containing? could they not have been containing?