must hee-haw
Regular verb: hee-haw - hee-hawed- hee-hawed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must hee-haw
you must hee-haw
she must hee-haw
we must hee-haw
you must hee-haw
they must hee-haw 	I must be hee-hawing
you must be hee-hawing
she must be hee-hawing
we must be hee-hawing
you must be hee-hawing
they must be hee-hawing	I must have hee-hawed
you must have hee-hawed
she must have hee-hawed
we must have hee-hawed
you must have hee-hawed
they must have hee-hawed	I must have been hee-hawing
you must have been hee-hawing
she must have been hee-hawing
we must have been hee-hawing
you must have been hee-hawing
they must have been hee-hawing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not hee-haw
you must not hee-haw
she must not hee-haw
we must not hee-haw
you must not hee-haw
they must not hee-haw 	I must not be hee-hawing
you must not be hee-hawing
she must not be hee-hawing
we must not be hee-hawing
you must not be hee-hawing
they must not be hee-hawing	I must not have hee-hawed
you must not have hee-hawed
she must not have hee-hawed
we must not have hee-hawed
you must not have hee-hawed
they must not have hee-hawed	I must not have been hee-hawing
you must not have been hee-hawing
she must not have been hee-hawing
we must not have been hee-hawing
you must not have been hee-hawing
they must not have been hee-hawing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I hee-haw?
must you hee-haw?
must she hee-haw?
must we hee-haw?
must you hee-haw?
must they hee-haw? 	must I be hee-hawing?
must you be hee-hawing?
must she be hee-hawing?
must we be hee-hawing?
must you be hee-hawing?
must they be hee-hawing? 	must I have hee-hawed?
must you have hee-hawed?
must she have hee-hawed?
must we have hee-hawed?
must you have hee-hawed?
must they have hee-hawed? 	must I have been hee-hawing?
must you have been hee-hawing?
must she have been hee-hawing?
must we have been hee-hawing?
must you have been hee-hawing?
must they have been hee-hawing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not hee-haw?
must you not hee-haw?
must she not hee-haw?
must we not hee-haw?
must you not hee-haw?
must they not hee-haw? 	must I not be hee-hawing?
must you not be hee-hawing?
must she not be hee-hawing?
must we not be hee-hawing?
must you not be hee-hawing?
must they not be hee-hawing? 	must I not have hee-hawed?
must you not have hee-hawed?
must she not have hee-hawed?
must we not have hee-hawed?
must you not have hee-hawed?
must they not have hee-hawed? 	must I not have been hee-hawing?
must you not have been hee-hawing?
must she not have been hee-hawing?
must we not have been hee-hawing?
must you not have been hee-hawing?
must they not have been hee-hawing?