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 cannot mar
you cannot mar
he cannot mar
we cannot mar
you cannot mar
they cannot mar 	I cannot be marring
you cannot be marring
he cannot be marring
we cannot be marring
you cannot be marring
they cannot be marring	I cannot have marred
you cannot have marred
he cannot have marred
we cannot have marred
you cannot have marred
they cannot have marred	I cannot have been marring
you cannot have been marring
he cannot have been marring
we cannot have been marring
you cannot have been marring
they cannot 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 I not mar?
can you not mar?
can he not mar?
can we not mar?
can you not mar?
can they not mar? 	can I not be marring?
can you not be marring?
can he not be marring?
can we not be marring?
can you not be marring?
can they not be marring? 	can I not have marred?
can you not have marred?
can he not have marred?
can we not have marred?
can you not have marred?
can they not have marred? 	can I not have been marring?
can you not have been marring?
can he not have been marring?
can we not have been marring?
can you not have been marring?
can they not have been marring?