must contain
Verbo regular: contain - contained- contained

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must contain
you must contain
she must contain
we must contain
you must contain
they must contain 	I must be containing
you must be containing
she must be containing
we must be containing
you must be containing
they must be containing	I must have contained
you must have contained
she must have contained
we must have contained
you must have contained
they must have contained	I must have been containing
you must have been containing
she must have been containing
we must have been containing
you must have been containing
they must have been containing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't contain
you mustn't contain
she mustn't contain
we mustn't contain
you mustn't contain
they mustn't contain 	I mustn't be containing
you mustn't be containing
she mustn't be containing
we mustn't be containing
you mustn't be containing
they mustn't be containing	I mustn't have contained
you mustn't have contained
she mustn't have contained
we mustn't have contained
you mustn't have contained
they mustn't have contained	I mustn't have been containing
you mustn't have been containing
she mustn't have been containing
we mustn't have been containing
you mustn't have been containing
they mustn't have been containing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I contain?
must you contain?
must she contain?
must we contain?
must you contain?
must they contain? 	must I be containing?
must you be containing?
must she be containing?
must we be containing?
must you be containing?
must they be containing? 	must I have contained?
must you have contained?
must she have contained?
must we have contained?
must you have contained?
must they have contained? 	must I have been containing?
must you have been containing?
must she have been containing?
must we have been containing?
must you have been containing?
must they have been containing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I contain?
mustn't you contain?
mustn't she contain?
mustn't we contain?
mustn't you contain?
mustn't they contain? 	mustn't I be containing?
mustn't you be containing?
mustn't she be containing?
mustn't we be containing?
mustn't you be containing?
mustn't they be containing? 	mustn't I have contained?
mustn't you have contained?
mustn't she have contained?
mustn't we have contained?
mustn't you have contained?
mustn't they have contained? 	mustn't I have been containing?
mustn't you have been containing?
mustn't she have been containing?
mustn't we have been containing?
mustn't you have been containing?
mustn't they have been containing?