must extrapolate
Regular verb: extrapolate - extrapolated- extrapolated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must extrapolate
you must extrapolate
she must extrapolate
we must extrapolate
you must extrapolate
they must extrapolate 	I must be extrapolating
you must be extrapolating
she must be extrapolating
we must be extrapolating
you must be extrapolating
they must be extrapolating	I must have extrapolated
you must have extrapolated
she must have extrapolated
we must have extrapolated
you must have extrapolated
they must have extrapolated	I must have been extrapolating
you must have been extrapolating
she must have been extrapolating
we must have been extrapolating
you must have been extrapolating
they must have been extrapolating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't extrapolate
you mustn't extrapolate
she mustn't extrapolate
we mustn't extrapolate
you mustn't extrapolate
they mustn't extrapolate 	I mustn't be extrapolating
you mustn't be extrapolating
she mustn't be extrapolating
we mustn't be extrapolating
you mustn't be extrapolating
they mustn't be extrapolating	I mustn't have extrapolated
you mustn't have extrapolated
she mustn't have extrapolated
we mustn't have extrapolated
you mustn't have extrapolated
they mustn't have extrapolated	I mustn't have been extrapolating
you mustn't have been extrapolating
she mustn't have been extrapolating
we mustn't have been extrapolating
you mustn't have been extrapolating
they mustn't have been extrapolating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I extrapolate?
must you extrapolate?
must she extrapolate?
must we extrapolate?
must you extrapolate?
must they extrapolate? 	must I be extrapolating?
must you be extrapolating?
must she be extrapolating?
must we be extrapolating?
must you be extrapolating?
must they be extrapolating? 	must I have extrapolated?
must you have extrapolated?
must she have extrapolated?
must we have extrapolated?
must you have extrapolated?
must they have extrapolated? 	must I have been extrapolating?
must you have been extrapolating?
must she have been extrapolating?
must we have been extrapolating?
must you have been extrapolating?
must they have been extrapolating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I extrapolate?
mustn't you extrapolate?
mustn't she extrapolate?
mustn't we extrapolate?
mustn't you extrapolate?
mustn't they extrapolate? 	mustn't I be extrapolating?
mustn't you be extrapolating?
mustn't she be extrapolating?
mustn't we be extrapolating?
mustn't you be extrapolating?
mustn't they be extrapolating? 	mustn't I have extrapolated?
mustn't you have extrapolated?
mustn't she have extrapolated?
mustn't we have extrapolated?
mustn't you have extrapolated?
mustn't they have extrapolated? 	mustn't I have been extrapolating?
mustn't you have been extrapolating?
mustn't she have been extrapolating?
mustn't we have been extrapolating?
mustn't you have been extrapolating?
mustn't they have been extrapolating?