must impose
Regular verb: impose - imposed- imposed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must impose
you must impose
she must impose
we must impose
you must impose
they must impose 	I must be imposing
you must be imposing
she must be imposing
we must be imposing
you must be imposing
they must be imposing	I must have imposed
you must have imposed
she must have imposed
we must have imposed
you must have imposed
they must have imposed	I must have been imposing
you must have been imposing
she must have been imposing
we must have been imposing
you must have been imposing
they must have been imposing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't impose
you mustn't impose
she mustn't impose
we mustn't impose
you mustn't impose
they mustn't impose 	I mustn't be imposing
you mustn't be imposing
she mustn't be imposing
we mustn't be imposing
you mustn't be imposing
they mustn't be imposing	I mustn't have imposed
you mustn't have imposed
she mustn't have imposed
we mustn't have imposed
you mustn't have imposed
they mustn't have imposed	I mustn't have been imposing
you mustn't have been imposing
she mustn't have been imposing
we mustn't have been imposing
you mustn't have been imposing
they mustn't have been imposing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I impose?
must you impose?
must she impose?
must we impose?
must you impose?
must they impose? 	must I be imposing?
must you be imposing?
must she be imposing?
must we be imposing?
must you be imposing?
must they be imposing? 	must I have imposed?
must you have imposed?
must she have imposed?
must we have imposed?
must you have imposed?
must they have imposed? 	must I have been imposing?
must you have been imposing?
must she have been imposing?
must we have been imposing?
must you have been imposing?
must they have been imposing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I impose?
mustn't you impose?
mustn't she impose?
mustn't we impose?
mustn't you impose?
mustn't they impose? 	mustn't I be imposing?
mustn't you be imposing?
mustn't she be imposing?
mustn't we be imposing?
mustn't you be imposing?
mustn't they be imposing? 	mustn't I have imposed?
mustn't you have imposed?
mustn't she have imposed?
mustn't we have imposed?
mustn't you have imposed?
mustn't they have imposed? 	mustn't I have been imposing?
mustn't you have been imposing?
mustn't she have been imposing?
mustn't we have been imposing?
mustn't you have been imposing?
mustn't they have been imposing?