must clown
Regular verb: clown - clowned- clowned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must clown
you must clown
he must clown
we must clown
you must clown
they must clown 	I must be clowning
you must be clowning
he must be clowning
we must be clowning
you must be clowning
they must be clowning	I must have clowned
you must have clowned
he must have clowned
we must have clowned
you must have clowned
they must have clowned	I must have been clowning
you must have been clowning
he must have been clowning
we must have been clowning
you must have been clowning
they must have been clowning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not clown
you must not clown
he must not clown
we must not clown
you must not clown
they must not clown 	I must not be clowning
you must not be clowning
he must not be clowning
we must not be clowning
you must not be clowning
they must not be clowning	I must not have clowned
you must not have clowned
he must not have clowned
we must not have clowned
you must not have clowned
they must not have clowned	I must not have been clowning
you must not have been clowning
he must not have been clowning
we must not have been clowning
you must not have been clowning
they must not have been clowning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I clown?
must you clown?
must he clown?
must we clown?
must you clown?
must they clown? 	must I be clowning?
must you be clowning?
must he be clowning?
must we be clowning?
must you be clowning?
must they be clowning? 	must I have clowned?
must you have clowned?
must he have clowned?
must we have clowned?
must you have clowned?
must they have clowned? 	must I have been clowning?
must you have been clowning?
must he have been clowning?
must we have been clowning?
must you have been clowning?
must they have been clowning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not clown?
must you not clown?
must he not clown?
must we not clown?
must you not clown?
must they not clown? 	must I not be clowning?
must you not be clowning?
must he not be clowning?
must we not be clowning?
must you not be clowning?
must they not be clowning? 	must I not have clowned?
must you not have clowned?
must he not have clowned?
must we not have clowned?
must you not have clowned?
must they not have clowned? 	must I not have been clowning?
must you not have been clowning?
must he not have been clowning?
must we not have been clowning?
must you not have been clowning?
must they not have been clowning?