must chorus
Regular verb: chorus - chorused- chorused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must chorus
you must chorus
he must chorus
we must chorus
you must chorus
they must chorus 	I must be chorusing
you must be chorusing
he must be chorusing
we must be chorusing
you must be chorusing
they must be chorusing	I must have chorused
you must have chorused
he must have chorused
we must have chorused
you must have chorused
they must have chorused	I must have been chorusing
you must have been chorusing
he must have been chorusing
we must have been chorusing
you must have been chorusing
they must have been chorusing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not chorus
you must not chorus
he must not chorus
we must not chorus
you must not chorus
they must not chorus 	I must not be chorusing
you must not be chorusing
he must not be chorusing
we must not be chorusing
you must not be chorusing
they must not be chorusing	I must not have chorused
you must not have chorused
he must not have chorused
we must not have chorused
you must not have chorused
they must not have chorused	I must not have been chorusing
you must not have been chorusing
he must not have been chorusing
we must not have been chorusing
you must not have been chorusing
they must not have been chorusing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I chorus?
must you chorus?
must he chorus?
must we chorus?
must you chorus?
must they chorus? 	must I be chorusing?
must you be chorusing?
must he be chorusing?
must we be chorusing?
must you be chorusing?
must they be chorusing? 	must I have chorused?
must you have chorused?
must he have chorused?
must we have chorused?
must you have chorused?
must they have chorused? 	must I have been chorusing?
must you have been chorusing?
must he have been chorusing?
must we have been chorusing?
must you have been chorusing?
must they have been chorusing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not chorus?
must you not chorus?
must he not chorus?
must we not chorus?
must you not chorus?
must they not chorus? 	must I not be chorusing?
must you not be chorusing?
must he not be chorusing?
must we not be chorusing?
must you not be chorusing?
must they not be chorusing? 	must I not have chorused?
must you not have chorused?
must he not have chorused?
must we not have chorused?
must you not have chorused?
must they not have chorused? 	must I not have been chorusing?
must you not have been chorusing?
must he not have been chorusing?
must we not have been chorusing?
must you not have been chorusing?
must they not have been chorusing?