must father
Regular verb: father - fathered- fathered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must father
you must father
she must father
we must father
you must father
they must father 	I must be fathering
you must be fathering
she must be fathering
we must be fathering
you must be fathering
they must be fathering	I must have fathered
you must have fathered
she must have fathered
we must have fathered
you must have fathered
they must have fathered	I must have been fathering
you must have been fathering
she must have been fathering
we must have been fathering
you must have been fathering
they must have been fathering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not father
you must not father
she must not father
we must not father
you must not father
they must not father 	I must not be fathering
you must not be fathering
she must not be fathering
we must not be fathering
you must not be fathering
they must not be fathering	I must not have fathered
you must not have fathered
she must not have fathered
we must not have fathered
you must not have fathered
they must not have fathered	I must not have been fathering
you must not have been fathering
she must not have been fathering
we must not have been fathering
you must not have been fathering
they must not have been fathering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I father?
must you father?
must she father?
must we father?
must you father?
must they father? 	must I be fathering?
must you be fathering?
must she be fathering?
must we be fathering?
must you be fathering?
must they be fathering? 	must I have fathered?
must you have fathered?
must she have fathered?
must we have fathered?
must you have fathered?
must they have fathered? 	must I have been fathering?
must you have been fathering?
must she have been fathering?
must we have been fathering?
must you have been fathering?
must they have been fathering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not father?
must you not father?
must she not father?
must we not father?
must you not father?
must they not father? 	must I not be fathering?
must you not be fathering?
must she not be fathering?
must we not be fathering?
must you not be fathering?
must they not be fathering? 	must I not have fathered?
must you not have fathered?
must she not have fathered?
must we not have fathered?
must you not have fathered?
must they not have fathered? 	must I not have been fathering?
must you not have been fathering?
must she not have been fathering?
must we not have been fathering?
must you not have been fathering?
must they not have been fathering?