could mar
Regular verb: mar - marred- marred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could mar
you could mar
she could mar
we could mar
you could mar
they could mar 	I could be marring
you could be marring
she could be marring
we could be marring
you could be marring
they could be marring	I could have marred
you could have marred
she could have marred
we could have marred
you could have marred
they could have marred	I could have been marring
you could have been marring
she could have been marring
we could have been marring
you could have been marring
they could have been marring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't mar
you couldn't mar
she couldn't mar
we couldn't mar
you couldn't mar
they couldn't mar 	I couldn't be marring
you couldn't be marring
she couldn't be marring
we couldn't be marring
you couldn't be marring
they couldn't be marring	I couldn't have marred
you couldn't have marred
she couldn't have marred
we couldn't have marred
you couldn't have marred
they couldn't have marred	I couldn't have been marring
you couldn't have been marring
she couldn't have been marring
we couldn't have been marring
you couldn't have been marring
they couldn't have been marring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I mar?
could you mar?
could she mar?
could we mar?
could you mar?
could they mar? 	could I be marring?
could you be marring?
could she be marring?
could we be marring?
could you be marring?
could they be marring? 	could I have marred?
could you have marred?
could she have marred?
could we have marred?
could you have marred?
could they have marred? 	could I have been marring?
could you have been marring?
could she have been marring?
could we have been marring?
could you have been marring?
could they have been marring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I mar?
couldn't you mar?
couldn't she mar?
couldn't we mar?
couldn't you mar?
couldn't they mar? 	couldn't I be marring?
couldn't you be marring?
couldn't she be marring?
couldn't we be marring?
couldn't you be marring?
couldn't they be marring? 	couldn't I have marred?
couldn't you have marred?
couldn't she have marred?
couldn't we have marred?
couldn't you have marred?
couldn't they have marred? 	couldn't I have been marring?
couldn't you have been marring?
couldn't she have been marring?
couldn't we have been marring?
couldn't you have been marring?
couldn't they have been marring?