must ruck
Regular verb: ruck - rucked- rucked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must ruck
you must ruck
he must ruck
we must ruck
you must ruck
they must ruck 	I must be rucking
you must be rucking
he must be rucking
we must be rucking
you must be rucking
they must be rucking	I must have rucked
you must have rucked
he must have rucked
we must have rucked
you must have rucked
they must have rucked	I must have been rucking
you must have been rucking
he must have been rucking
we must have been rucking
you must have been rucking
they must have been rucking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not ruck
you must not ruck
he must not ruck
we must not ruck
you must not ruck
they must not ruck 	I must not be rucking
you must not be rucking
he must not be rucking
we must not be rucking
you must not be rucking
they must not be rucking	I must not have rucked
you must not have rucked
he must not have rucked
we must not have rucked
you must not have rucked
they must not have rucked	I must not have been rucking
you must not have been rucking
he must not have been rucking
we must not have been rucking
you must not have been rucking
they must not have been rucking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I ruck?
must you ruck?
must he ruck?
must we ruck?
must you ruck?
must they ruck? 	must I be rucking?
must you be rucking?
must he be rucking?
must we be rucking?
must you be rucking?
must they be rucking? 	must I have rucked?
must you have rucked?
must he have rucked?
must we have rucked?
must you have rucked?
must they have rucked? 	must I have been rucking?
must you have been rucking?
must he have been rucking?
must we have been rucking?
must you have been rucking?
must they have been rucking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not ruck?
must you not ruck?
must he not ruck?
must we not ruck?
must you not ruck?
must they not ruck? 	must I not be rucking?
must you not be rucking?
must he not be rucking?
must we not be rucking?
must you not be rucking?
must they not be rucking? 	must I not have rucked?
must you not have rucked?
must he not have rucked?
must we not have rucked?
must you not have rucked?
must they not have rucked? 	must I not have been rucking?
must you not have been rucking?
must he not have been rucking?
must we not have been rucking?
must you not have been rucking?
must they not have been rucking?