could contain
Regular verb: contain - contained- contained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I couldn't contain
you couldn't contain
she couldn't contain
we couldn't contain
you couldn't contain
they couldn't contain 	I couldn't be containing
you couldn't be containing
she couldn't be containing
we couldn't be containing
you couldn't be containing
they couldn't be containing	I couldn't have contained
you couldn't have contained
she couldn't have contained
we couldn't have contained
you couldn't have contained
they couldn't have contained	I couldn't have been containing
you couldn't have been containing
she couldn't have been containing
we couldn't have been containing
you couldn't have been containing
they couldn't have been containing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
couldn't I contain?
couldn't you contain?
couldn't she contain?
couldn't we contain?
couldn't you contain?
couldn't they contain? 	couldn't I be containing?
couldn't you be containing?
couldn't she be containing?
couldn't we be containing?
couldn't you be containing?
couldn't they be containing? 	couldn't I have contained?
couldn't you have contained?
couldn't she have contained?
couldn't we have contained?
couldn't you have contained?
couldn't they have contained? 	couldn't I have been containing?
couldn't you have been containing?
couldn't she have been containing?
couldn't we have been containing?
couldn't you have been containing?
couldn't they have been containing?