must prolongate
Regular verb: prolongate - prolongated- prolongated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prolongate
you must prolongate
he must prolongate
we must prolongate
you must prolongate
they must prolongate 	I must be prolongating
you must be prolongating
he must be prolongating
we must be prolongating
you must be prolongating
they must be prolongating	I must have prolongated
you must have prolongated
he must have prolongated
we must have prolongated
you must have prolongated
they must have prolongated	I must have been prolongating
you must have been prolongating
he must have been prolongating
we must have been prolongating
you must have been prolongating
they must have been prolongating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not prolongate
you must not prolongate
he must not prolongate
we must not prolongate
you must not prolongate
they must not prolongate 	I must not be prolongating
you must not be prolongating
he must not be prolongating
we must not be prolongating
you must not be prolongating
they must not be prolongating	I must not have prolongated
you must not have prolongated
he must not have prolongated
we must not have prolongated
you must not have prolongated
they must not have prolongated	I must not have been prolongating
you must not have been prolongating
he must not have been prolongating
we must not have been prolongating
you must not have been prolongating
they must not have been prolongating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prolongate?
must you prolongate?
must he prolongate?
must we prolongate?
must you prolongate?
must they prolongate? 	must I be prolongating?
must you be prolongating?
must he be prolongating?
must we be prolongating?
must you be prolongating?
must they be prolongating? 	must I have prolongated?
must you have prolongated?
must he have prolongated?
must we have prolongated?
must you have prolongated?
must they have prolongated? 	must I have been prolongating?
must you have been prolongating?
must he have been prolongating?
must we have been prolongating?
must you have been prolongating?
must they have been prolongating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not prolongate?
must you not prolongate?
must he not prolongate?
must we not prolongate?
must you not prolongate?
must they not prolongate? 	must I not be prolongating?
must you not be prolongating?
must he not be prolongating?
must we not be prolongating?
must you not be prolongating?
must they not be prolongating? 	must I not have prolongated?
must you not have prolongated?
must he not have prolongated?
must we not have prolongated?
must you not have prolongated?
must they not have prolongated? 	must I not have been prolongating?
must you not have been prolongating?
must he not have been prolongating?
must we not have been prolongating?
must you not have been prolongating?
must they not have been prolongating?