must centrifuge
Regular verb: centrifuge - centrifuged- centrifuged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must centrifuge
you must centrifuge
he must centrifuge
we must centrifuge
you must centrifuge
they must centrifuge 	I must be centrifuging
you must be centrifuging
he must be centrifuging
we must be centrifuging
you must be centrifuging
they must be centrifuging	I must have centrifuged
you must have centrifuged
he must have centrifuged
we must have centrifuged
you must have centrifuged
they must have centrifuged	I must have been centrifuging
you must have been centrifuging
he must have been centrifuging
we must have been centrifuging
you must have been centrifuging
they must have been centrifuging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not centrifuge
you must not centrifuge
he must not centrifuge
we must not centrifuge
you must not centrifuge
they must not centrifuge 	I must not be centrifuging
you must not be centrifuging
he must not be centrifuging
we must not be centrifuging
you must not be centrifuging
they must not be centrifuging	I must not have centrifuged
you must not have centrifuged
he must not have centrifuged
we must not have centrifuged
you must not have centrifuged
they must not have centrifuged	I must not have been centrifuging
you must not have been centrifuging
he must not have been centrifuging
we must not have been centrifuging
you must not have been centrifuging
they must not have been centrifuging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I centrifuge?
must you centrifuge?
must he centrifuge?
must we centrifuge?
must you centrifuge?
must they centrifuge? 	must I be centrifuging?
must you be centrifuging?
must he be centrifuging?
must we be centrifuging?
must you be centrifuging?
must they be centrifuging? 	must I have centrifuged?
must you have centrifuged?
must he have centrifuged?
must we have centrifuged?
must you have centrifuged?
must they have centrifuged? 	must I have been centrifuging?
must you have been centrifuging?
must he have been centrifuging?
must we have been centrifuging?
must you have been centrifuging?
must they have been centrifuging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not centrifuge?
must you not centrifuge?
must he not centrifuge?
must we not centrifuge?
must you not centrifuge?
must they not centrifuge? 	must I not be centrifuging?
must you not be centrifuging?
must he not be centrifuging?
must we not be centrifuging?
must you not be centrifuging?
must they not be centrifuging? 	must I not have centrifuged?
must you not have centrifuged?
must he not have centrifuged?
must we not have centrifuged?
must you not have centrifuged?
must they not have centrifuged? 	must I not have been centrifuging?
must you not have been centrifuging?
must he not have been centrifuging?
must we not have been centrifuging?
must you not have been centrifuging?
must they not have been centrifuging?