should contain
Regular verb: contain - contained- contained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd contain
you'd contain
he'd contain
we'd contain
you'd contain
they'd contain 	I'd be containing
you'd be containing
he'd be containing
we'd be containing
you'd be containing
they'd be containing	I should've contained
you should've contained
he should've contained
we should've contained
you should've contained
they should've contained	I should've been containing
you should've been containing
he should've been containing
we should've been containing
you should've been containing
they should've been containing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't contain
you shouldn't contain
he shouldn't contain
we shouldn't contain
you shouldn't contain
they shouldn't contain 	I shouldn't be containing
you shouldn't be containing
he shouldn't be containing
we shouldn't be containing
you shouldn't be containing
they shouldn't be containing	I shouldn't have contained
you shouldn't have contained
he shouldn't have contained
we shouldn't have contained
you shouldn't have contained
they shouldn't have contained	I shouldn't have been containing
you shouldn't have been containing
he shouldn't have been containing
we shouldn't have been containing
you shouldn't have been containing
they shouldn't have been containing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I contain?
should you contain?
should he contain?
should we contain?
should you contain?
should they contain? 	should I be containing?
should you be containing?
should he be containing?
should we be containing?
should you be containing?
should they be containing? 	should I have contained?
should you have contained?
should he have contained?
should we have contained?
should you have contained?
should they have contained? 	should I have been containing?
should you have been containing?
should he have been containing?
should we have been containing?
should you have been containing?
should they have been containing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I contain?
shouldn't you contain?
shouldn't he contain?
shouldn't we contain?
shouldn't you contain?
shouldn't they contain? 	shouldn't I be containing?
shouldn't you be containing?
shouldn't he be containing?
shouldn't we be containing?
shouldn't you be containing?
shouldn't they be containing? 	shouldn't I have contained?
shouldn't you have contained?
shouldn't he have contained?
shouldn't we have contained?
shouldn't you have contained?
shouldn't they have contained? 	shouldn't I have been containing?
shouldn't you have been containing?
shouldn't he have been containing?
shouldn't we have been containing?
shouldn't you have been containing?
shouldn't they have been containing?