must boohoo
Regular verb: boohoo - boohooed- boohooed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must boohoo
you must boohoo
he must boohoo
we must boohoo
you must boohoo
they must boohoo 	I must be boohooing
you must be boohooing
he must be boohooing
we must be boohooing
you must be boohooing
they must be boohooing	I must have boohooed
you must have boohooed
he must have boohooed
we must have boohooed
you must have boohooed
they must have boohooed	I must have been boohooing
you must have been boohooing
he must have been boohooing
we must have been boohooing
you must have been boohooing
they must have been boohooing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not boohoo
you must not boohoo
he must not boohoo
we must not boohoo
you must not boohoo
they must not boohoo 	I must not be boohooing
you must not be boohooing
he must not be boohooing
we must not be boohooing
you must not be boohooing
they must not be boohooing	I must not have boohooed
you must not have boohooed
he must not have boohooed
we must not have boohooed
you must not have boohooed
they must not have boohooed	I must not have been boohooing
you must not have been boohooing
he must not have been boohooing
we must not have been boohooing
you must not have been boohooing
they must not have been boohooing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I boohoo?
must you boohoo?
must he boohoo?
must we boohoo?
must you boohoo?
must they boohoo? 	must I be boohooing?
must you be boohooing?
must he be boohooing?
must we be boohooing?
must you be boohooing?
must they be boohooing? 	must I have boohooed?
must you have boohooed?
must he have boohooed?
must we have boohooed?
must you have boohooed?
must they have boohooed? 	must I have been boohooing?
must you have been boohooing?
must he have been boohooing?
must we have been boohooing?
must you have been boohooing?
must they have been boohooing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not boohoo?
must you not boohoo?
must he not boohoo?
must we not boohoo?
must you not boohoo?
must they not boohoo? 	must I not be boohooing?
must you not be boohooing?
must he not be boohooing?
must we not be boohooing?
must you not be boohooing?
must they not be boohooing? 	must I not have boohooed?
must you not have boohooed?
must he not have boohooed?
must we not have boohooed?
must you not have boohooed?
must they not have boohooed? 	must I not have been boohooing?
must you not have been boohooing?
must he not have been boohooing?
must we not have been boohooing?
must you not have been boohooing?
must they not have been boohooing?