could vise
Regular verb: vise - vised- vised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could vise
you could vise
he could vise
we could vise
you could vise
they could vise 	I could be vising
you could be vising
he could be vising
we could be vising
you could be vising
they could be vising	I could have vised
you could have vised
he could have vised
we could have vised
you could have vised
they could have vised	I could have been vising
you could have been vising
he could have been vising
we could have been vising
you could have been vising
they could have been vising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't vise
you couldn't vise
he couldn't vise
we couldn't vise
you couldn't vise
they couldn't vise 	I couldn't be vising
you couldn't be vising
he couldn't be vising
we couldn't be vising
you couldn't be vising
they couldn't be vising	I couldn't have vised
you couldn't have vised
he couldn't have vised
we couldn't have vised
you couldn't have vised
they couldn't have vised	I couldn't have been vising
you couldn't have been vising
he couldn't have been vising
we couldn't have been vising
you couldn't have been vising
they couldn't have been vising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I vise?
could you vise?
could he vise?
could we vise?
could you vise?
could they vise? 	could I be vising?
could you be vising?
could he be vising?
could we be vising?
could you be vising?
could they be vising? 	could I have vised?
could you have vised?
could he have vised?
could we have vised?
could you have vised?
could they have vised? 	could I have been vising?
could you have been vising?
could he have been vising?
could we have been vising?
could you have been vising?
could they have been vising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I vise?
couldn't you vise?
couldn't he vise?
couldn't we vise?
couldn't you vise?
couldn't they vise? 	couldn't I be vising?
couldn't you be vising?
couldn't he be vising?
couldn't we be vising?
couldn't you be vising?
couldn't they be vising? 	couldn't I have vised?
couldn't you have vised?
couldn't he have vised?
couldn't we have vised?
couldn't you have vised?
couldn't they have vised? 	couldn't I have been vising?
couldn't you have been vising?
couldn't he have been vising?
couldn't we have been vising?
couldn't you have been vising?
couldn't they have been vising?