could impose
Regular verb: impose - imposed- imposed

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

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

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

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