must patter
Regular verb: patter - pattered- pattered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must patter
you must patter
she must patter
we must patter
you must patter
they must patter 	I must be pattering
you must be pattering
she must be pattering
we must be pattering
you must be pattering
they must be pattering	I must have pattered
you must have pattered
she must have pattered
we must have pattered
you must have pattered
they must have pattered	I must have been pattering
you must have been pattering
she must have been pattering
we must have been pattering
you must have been pattering
they must have been pattering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not patter
you must not patter
she must not patter
we must not patter
you must not patter
they must not patter 	I must not be pattering
you must not be pattering
she must not be pattering
we must not be pattering
you must not be pattering
they must not be pattering	I must not have pattered
you must not have pattered
she must not have pattered
we must not have pattered
you must not have pattered
they must not have pattered	I must not have been pattering
you must not have been pattering
she must not have been pattering
we must not have been pattering
you must not have been pattering
they must not have been pattering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I patter?
must you patter?
must she patter?
must we patter?
must you patter?
must they patter? 	must I be pattering?
must you be pattering?
must she be pattering?
must we be pattering?
must you be pattering?
must they be pattering? 	must I have pattered?
must you have pattered?
must she have pattered?
must we have pattered?
must you have pattered?
must they have pattered? 	must I have been pattering?
must you have been pattering?
must she have been pattering?
must we have been pattering?
must you have been pattering?
must they have been pattering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not patter?
must you not patter?
must she not patter?
must we not patter?
must you not patter?
must they not patter? 	must I not be pattering?
must you not be pattering?
must she not be pattering?
must we not be pattering?
must you not be pattering?
must they not be pattering? 	must I not have pattered?
must you not have pattered?
must she not have pattered?
must we not have pattered?
must you not have pattered?
must they not have pattered? 	must I not have been pattering?
must you not have been pattering?
must she not have been pattering?
must we not have been pattering?
must you not have been pattering?
must they not have been pattering?