must fibrillate
Regular verb: fibrillate - fibrillated- fibrillated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fibrillate
you must fibrillate
he must fibrillate
we must fibrillate
you must fibrillate
they must fibrillate 	I must be fibrillating
you must be fibrillating
he must be fibrillating
we must be fibrillating
you must be fibrillating
they must be fibrillating	I must have fibrillated
you must have fibrillated
he must have fibrillated
we must have fibrillated
you must have fibrillated
they must have fibrillated	I must have been fibrillating
you must have been fibrillating
he must have been fibrillating
we must have been fibrillating
you must have been fibrillating
they must have been fibrillating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not fibrillate
you must not fibrillate
he must not fibrillate
we must not fibrillate
you must not fibrillate
they must not fibrillate 	I must not be fibrillating
you must not be fibrillating
he must not be fibrillating
we must not be fibrillating
you must not be fibrillating
they must not be fibrillating	I must not have fibrillated
you must not have fibrillated
he must not have fibrillated
we must not have fibrillated
you must not have fibrillated
they must not have fibrillated	I must not have been fibrillating
you must not have been fibrillating
he must not have been fibrillating
we must not have been fibrillating
you must not have been fibrillating
they must not have been fibrillating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fibrillate?
must you fibrillate?
must he fibrillate?
must we fibrillate?
must you fibrillate?
must they fibrillate? 	must I be fibrillating?
must you be fibrillating?
must he be fibrillating?
must we be fibrillating?
must you be fibrillating?
must they be fibrillating? 	must I have fibrillated?
must you have fibrillated?
must he have fibrillated?
must we have fibrillated?
must you have fibrillated?
must they have fibrillated? 	must I have been fibrillating?
must you have been fibrillating?
must he have been fibrillating?
must we have been fibrillating?
must you have been fibrillating?
must they have been fibrillating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not fibrillate?
must you not fibrillate?
must he not fibrillate?
must we not fibrillate?
must you not fibrillate?
must they not fibrillate? 	must I not be fibrillating?
must you not be fibrillating?
must he not be fibrillating?
must we not be fibrillating?
must you not be fibrillating?
must they not be fibrillating? 	must I not have fibrillated?
must you not have fibrillated?
must he not have fibrillated?
must we not have fibrillated?
must you not have fibrillated?
must they not have fibrillated? 	must I not have been fibrillating?
must you not have been fibrillating?
must he not have been fibrillating?
must we not have been fibrillating?
must you not have been fibrillating?
must they not have been fibrillating?