must chuck
Regular verb: chuck - chucked- chucked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must chuck
you must chuck
he must chuck
we must chuck
you must chuck
they must chuck 	I must be chucking
you must be chucking
he must be chucking
we must be chucking
you must be chucking
they must be chucking	I must have chucked
you must have chucked
he must have chucked
we must have chucked
you must have chucked
they must have chucked	I must have been chucking
you must have been chucking
he must have been chucking
we must have been chucking
you must have been chucking
they must have been chucking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not chuck
you must not chuck
he must not chuck
we must not chuck
you must not chuck
they must not chuck 	I must not be chucking
you must not be chucking
he must not be chucking
we must not be chucking
you must not be chucking
they must not be chucking	I must not have chucked
you must not have chucked
he must not have chucked
we must not have chucked
you must not have chucked
they must not have chucked	I must not have been chucking
you must not have been chucking
he must not have been chucking
we must not have been chucking
you must not have been chucking
they must not have been chucking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I chuck?
must you chuck?
must he chuck?
must we chuck?
must you chuck?
must they chuck? 	must I be chucking?
must you be chucking?
must he be chucking?
must we be chucking?
must you be chucking?
must they be chucking? 	must I have chucked?
must you have chucked?
must he have chucked?
must we have chucked?
must you have chucked?
must they have chucked? 	must I have been chucking?
must you have been chucking?
must he have been chucking?
must we have been chucking?
must you have been chucking?
must they have been chucking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not chuck?
must you not chuck?
must he not chuck?
must we not chuck?
must you not chuck?
must they not chuck? 	must I not be chucking?
must you not be chucking?
must he not be chucking?
must we not be chucking?
must you not be chucking?
must they not be chucking? 	must I not have chucked?
must you not have chucked?
must he not have chucked?
must we not have chucked?
must you not have chucked?
must they not have chucked? 	must I not have been chucking?
must you not have been chucking?
must he not have been chucking?
must we not have been chucking?
must you not have been chucking?
must they not have been chucking?