must brainstorm
Regular verb: brainstorm - brainstormed- brainstormed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must brainstorm
you must brainstorm
she must brainstorm
we must brainstorm
you must brainstorm
they must brainstorm 	I must be brainstorming
you must be brainstorming
she must be brainstorming
we must be brainstorming
you must be brainstorming
they must be brainstorming	I must have brainstormed
you must have brainstormed
she must have brainstormed
we must have brainstormed
you must have brainstormed
they must have brainstormed	I must have been brainstorming
you must have been brainstorming
she must have been brainstorming
we must have been brainstorming
you must have been brainstorming
they must have been brainstorming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not brainstorm
you must not brainstorm
she must not brainstorm
we must not brainstorm
you must not brainstorm
they must not brainstorm 	I must not be brainstorming
you must not be brainstorming
she must not be brainstorming
we must not be brainstorming
you must not be brainstorming
they must not be brainstorming	I must not have brainstormed
you must not have brainstormed
she must not have brainstormed
we must not have brainstormed
you must not have brainstormed
they must not have brainstormed	I must not have been brainstorming
you must not have been brainstorming
she must not have been brainstorming
we must not have been brainstorming
you must not have been brainstorming
they must not have been brainstorming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I brainstorm?
must you brainstorm?
must she brainstorm?
must we brainstorm?
must you brainstorm?
must they brainstorm? 	must I be brainstorming?
must you be brainstorming?
must she be brainstorming?
must we be brainstorming?
must you be brainstorming?
must they be brainstorming? 	must I have brainstormed?
must you have brainstormed?
must she have brainstormed?
must we have brainstormed?
must you have brainstormed?
must they have brainstormed? 	must I have been brainstorming?
must you have been brainstorming?
must she have been brainstorming?
must we have been brainstorming?
must you have been brainstorming?
must they have been brainstorming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not brainstorm?
must you not brainstorm?
must she not brainstorm?
must we not brainstorm?
must you not brainstorm?
must they not brainstorm? 	must I not be brainstorming?
must you not be brainstorming?
must she not be brainstorming?
must we not be brainstorming?
must you not be brainstorming?
must they not be brainstorming? 	must I not have brainstormed?
must you not have brainstormed?
must she not have brainstormed?
must we not have brainstormed?
must you not have brainstormed?
must they not have brainstormed? 	must I not have been brainstorming?
must you not have been brainstorming?
must she not have been brainstorming?
must we not have been brainstorming?
must you not have been brainstorming?
must they not have been brainstorming?