must busy
Regular verb: busy - busied- busied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must busy
you must busy
she must busy
we must busy
you must busy
they must busy 	I must be busying
you must be busying
she must be busying
we must be busying
you must be busying
they must be busying	I must have busied
you must have busied
she must have busied
we must have busied
you must have busied
they must have busied	I must have been busying
you must have been busying
she must have been busying
we must have been busying
you must have been busying
they must have been busying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not busy
you must not busy
she must not busy
we must not busy
you must not busy
they must not busy 	I must not be busying
you must not be busying
she must not be busying
we must not be busying
you must not be busying
they must not be busying	I must not have busied
you must not have busied
she must not have busied
we must not have busied
you must not have busied
they must not have busied	I must not have been busying
you must not have been busying
she must not have been busying
we must not have been busying
you must not have been busying
they must not have been busying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I busy?
must you busy?
must she busy?
must we busy?
must you busy?
must they busy? 	must I be busying?
must you be busying?
must she be busying?
must we be busying?
must you be busying?
must they be busying? 	must I have busied?
must you have busied?
must she have busied?
must we have busied?
must you have busied?
must they have busied? 	must I have been busying?
must you have been busying?
must she have been busying?
must we have been busying?
must you have been busying?
must they have been busying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not busy?
must you not busy?
must she not busy?
must we not busy?
must you not busy?
must they not busy? 	must I not be busying?
must you not be busying?
must she not be busying?
must we not be busying?
must you not be busying?
must they not be busying? 	must I not have busied?
must you not have busied?
must she not have busied?
must we not have busied?
must you not have busied?
must they not have busied? 	must I not have been busying?
must you not have been busying?
must she not have been busying?
must we not have been busying?
must you not have been busying?
must they not have been busying?