must mar
Regular verb: mar - marred- marred

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not mar
you must not mar
she must not mar
we must not mar
you must not mar
they must not mar 	I must not be marring
you must not be marring
she must not be marring
we must not be marring
you must not be marring
they must not be marring	I must not have marred
you must not have marred
she must not have marred
we must not have marred
you must not have marred
they must not have marred	I must not have been marring
you must not have been marring
she must not have been marring
we must not have been marring
you must not have been marring
they must not have been marring	

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

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