must cerebrate
Regular verb: cerebrate - cerebrated- cerebrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must cerebrate
you must cerebrate
he must cerebrate
we must cerebrate
you must cerebrate
they must cerebrate 	I must be cerebrating
you must be cerebrating
he must be cerebrating
we must be cerebrating
you must be cerebrating
they must be cerebrating	I must have cerebrated
you must have cerebrated
he must have cerebrated
we must have cerebrated
you must have cerebrated
they must have cerebrated	I must have been cerebrating
you must have been cerebrating
he must have been cerebrating
we must have been cerebrating
you must have been cerebrating
they must have been cerebrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not cerebrate
you must not cerebrate
he must not cerebrate
we must not cerebrate
you must not cerebrate
they must not cerebrate 	I must not be cerebrating
you must not be cerebrating
he must not be cerebrating
we must not be cerebrating
you must not be cerebrating
they must not be cerebrating	I must not have cerebrated
you must not have cerebrated
he must not have cerebrated
we must not have cerebrated
you must not have cerebrated
they must not have cerebrated	I must not have been cerebrating
you must not have been cerebrating
he must not have been cerebrating
we must not have been cerebrating
you must not have been cerebrating
they must not have been cerebrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I cerebrate?
must you cerebrate?
must he cerebrate?
must we cerebrate?
must you cerebrate?
must they cerebrate? 	must I be cerebrating?
must you be cerebrating?
must he be cerebrating?
must we be cerebrating?
must you be cerebrating?
must they be cerebrating? 	must I have cerebrated?
must you have cerebrated?
must he have cerebrated?
must we have cerebrated?
must you have cerebrated?
must they have cerebrated? 	must I have been cerebrating?
must you have been cerebrating?
must he have been cerebrating?
must we have been cerebrating?
must you have been cerebrating?
must they have been cerebrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not cerebrate?
must you not cerebrate?
must he not cerebrate?
must we not cerebrate?
must you not cerebrate?
must they not cerebrate? 	must I not be cerebrating?
must you not be cerebrating?
must he not be cerebrating?
must we not be cerebrating?
must you not be cerebrating?
must they not be cerebrating? 	must I not have cerebrated?
must you not have cerebrated?
must he not have cerebrated?
must we not have cerebrated?
must you not have cerebrated?
must they not have cerebrated? 	must I not have been cerebrating?
must you not have been cerebrating?
must he not have been cerebrating?
must we not have been cerebrating?
must you not have been cerebrating?
must they not have been cerebrating?