must fractionate
Regular verb: fractionate - fractionated- fractionated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fractionate
you must fractionate
she must fractionate
we must fractionate
you must fractionate
they must fractionate 	I must be fractionating
you must be fractionating
she must be fractionating
we must be fractionating
you must be fractionating
they must be fractionating	I must have fractionated
you must have fractionated
she must have fractionated
we must have fractionated
you must have fractionated
they must have fractionated	I must have been fractionating
you must have been fractionating
she must have been fractionating
we must have been fractionating
you must have been fractionating
they must have been fractionating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't fractionate
you mustn't fractionate
she mustn't fractionate
we mustn't fractionate
you mustn't fractionate
they mustn't fractionate 	I mustn't be fractionating
you mustn't be fractionating
she mustn't be fractionating
we mustn't be fractionating
you mustn't be fractionating
they mustn't be fractionating	I mustn't have fractionated
you mustn't have fractionated
she mustn't have fractionated
we mustn't have fractionated
you mustn't have fractionated
they mustn't have fractionated	I mustn't have been fractionating
you mustn't have been fractionating
she mustn't have been fractionating
we mustn't have been fractionating
you mustn't have been fractionating
they mustn't have been fractionating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fractionate?
must you fractionate?
must she fractionate?
must we fractionate?
must you fractionate?
must they fractionate? 	must I be fractionating?
must you be fractionating?
must she be fractionating?
must we be fractionating?
must you be fractionating?
must they be fractionating? 	must I have fractionated?
must you have fractionated?
must she have fractionated?
must we have fractionated?
must you have fractionated?
must they have fractionated? 	must I have been fractionating?
must you have been fractionating?
must she have been fractionating?
must we have been fractionating?
must you have been fractionating?
must they have been fractionating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I fractionate?
mustn't you fractionate?
mustn't she fractionate?
mustn't we fractionate?
mustn't you fractionate?
mustn't they fractionate? 	mustn't I be fractionating?
mustn't you be fractionating?
mustn't she be fractionating?
mustn't we be fractionating?
mustn't you be fractionating?
mustn't they be fractionating? 	mustn't I have fractionated?
mustn't you have fractionated?
mustn't she have fractionated?
mustn't we have fractionated?
mustn't you have fractionated?
mustn't they have fractionated? 	mustn't I have been fractionating?
mustn't you have been fractionating?
mustn't she have been fractionating?
mustn't we have been fractionating?
mustn't you have been fractionating?
mustn't they have been fractionating?