could vowelise
Regular verb: vowelise - vowelised- vowelised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could vowelise
you could vowelise
he could vowelise
we could vowelise
you could vowelise
they could vowelise 	I could be vowelising
you could be vowelising
he could be vowelising
we could be vowelising
you could be vowelising
they could be vowelising	I could have vowelised
you could have vowelised
he could have vowelised
we could have vowelised
you could have vowelised
they could have vowelised	I could have been vowelising
you could have been vowelising
he could have been vowelising
we could have been vowelising
you could have been vowelising
they could have been vowelising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't vowelise
you couldn't vowelise
he couldn't vowelise
we couldn't vowelise
you couldn't vowelise
they couldn't vowelise 	I couldn't be vowelising
you couldn't be vowelising
he couldn't be vowelising
we couldn't be vowelising
you couldn't be vowelising
they couldn't be vowelising	I couldn't have vowelised
you couldn't have vowelised
he couldn't have vowelised
we couldn't have vowelised
you couldn't have vowelised
they couldn't have vowelised	I couldn't have been vowelising
you couldn't have been vowelising
he couldn't have been vowelising
we couldn't have been vowelising
you couldn't have been vowelising
they couldn't have been vowelising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I vowelise?
could you vowelise?
could he vowelise?
could we vowelise?
could you vowelise?
could they vowelise? 	could I be vowelising?
could you be vowelising?
could he be vowelising?
could we be vowelising?
could you be vowelising?
could they be vowelising? 	could I have vowelised?
could you have vowelised?
could he have vowelised?
could we have vowelised?
could you have vowelised?
could they have vowelised? 	could I have been vowelising?
could you have been vowelising?
could he have been vowelising?
could we have been vowelising?
could you have been vowelising?
could they have been vowelising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I vowelise?
couldn't you vowelise?
couldn't he vowelise?
couldn't we vowelise?
couldn't you vowelise?
couldn't they vowelise? 	couldn't I be vowelising?
couldn't you be vowelising?
couldn't he be vowelising?
couldn't we be vowelising?
couldn't you be vowelising?
couldn't they be vowelising? 	couldn't I have vowelised?
couldn't you have vowelised?
couldn't he have vowelised?
couldn't we have vowelised?
couldn't you have vowelised?
couldn't they have vowelised? 	couldn't I have been vowelising?
couldn't you have been vowelising?
couldn't he have been vowelising?
couldn't we have been vowelising?
couldn't you have been vowelising?
couldn't they have been vowelising?