must fag
Regular verb: fag - fagged- fagged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fag
you must fag
she must fag
we must fag
you must fag
they must fag 	I must be fagging
you must be fagging
she must be fagging
we must be fagging
you must be fagging
they must be fagging	I must have fagged
you must have fagged
she must have fagged
we must have fagged
you must have fagged
they must have fagged	I must have been fagging
you must have been fagging
she must have been fagging
we must have been fagging
you must have been fagging
they must have been fagging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not fag
you must not fag
she must not fag
we must not fag
you must not fag
they must not fag 	I must not be fagging
you must not be fagging
she must not be fagging
we must not be fagging
you must not be fagging
they must not be fagging	I must not have fagged
you must not have fagged
she must not have fagged
we must not have fagged
you must not have fagged
they must not have fagged	I must not have been fagging
you must not have been fagging
she must not have been fagging
we must not have been fagging
you must not have been fagging
they must not have been fagging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fag?
must you fag?
must she fag?
must we fag?
must you fag?
must they fag? 	must I be fagging?
must you be fagging?
must she be fagging?
must we be fagging?
must you be fagging?
must they be fagging? 	must I have fagged?
must you have fagged?
must she have fagged?
must we have fagged?
must you have fagged?
must they have fagged? 	must I have been fagging?
must you have been fagging?
must she have been fagging?
must we have been fagging?
must you have been fagging?
must they have been fagging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not fag?
must you not fag?
must she not fag?
must we not fag?
must you not fag?
must they not fag? 	must I not be fagging?
must you not be fagging?
must she not be fagging?
must we not be fagging?
must you not be fagging?
must they not be fagging? 	must I not have fagged?
must you not have fagged?
must she not have fagged?
must we not have fagged?
must you not have fagged?
must they not have fagged? 	must I not have been fagging?
must you not have been fagging?
must she not have been fagging?
must we not have been fagging?
must you not have been fagging?
must they not have been fagging?