can mar
Regular verb: mar - marred- marred

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

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

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

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