must interpenetrate
Regular verb: interpenetrate - interpenetrated- interpenetrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must interpenetrate
you must interpenetrate
he must interpenetrate
we must interpenetrate
you must interpenetrate
they must interpenetrate 	I must be interpenetrating
you must be interpenetrating
he must be interpenetrating
we must be interpenetrating
you must be interpenetrating
they must be interpenetrating	I must have interpenetrated
you must have interpenetrated
he must have interpenetrated
we must have interpenetrated
you must have interpenetrated
they must have interpenetrated	I must have been interpenetrating
you must have been interpenetrating
he must have been interpenetrating
we must have been interpenetrating
you must have been interpenetrating
they must have been interpenetrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not interpenetrate
you must not interpenetrate
he must not interpenetrate
we must not interpenetrate
you must not interpenetrate
they must not interpenetrate 	I must not be interpenetrating
you must not be interpenetrating
he must not be interpenetrating
we must not be interpenetrating
you must not be interpenetrating
they must not be interpenetrating	I must not have interpenetrated
you must not have interpenetrated
he must not have interpenetrated
we must not have interpenetrated
you must not have interpenetrated
they must not have interpenetrated	I must not have been interpenetrating
you must not have been interpenetrating
he must not have been interpenetrating
we must not have been interpenetrating
you must not have been interpenetrating
they must not have been interpenetrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I interpenetrate?
must you interpenetrate?
must he interpenetrate?
must we interpenetrate?
must you interpenetrate?
must they interpenetrate? 	must I be interpenetrating?
must you be interpenetrating?
must he be interpenetrating?
must we be interpenetrating?
must you be interpenetrating?
must they be interpenetrating? 	must I have interpenetrated?
must you have interpenetrated?
must he have interpenetrated?
must we have interpenetrated?
must you have interpenetrated?
must they have interpenetrated? 	must I have been interpenetrating?
must you have been interpenetrating?
must he have been interpenetrating?
must we have been interpenetrating?
must you have been interpenetrating?
must they have been interpenetrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not interpenetrate?
must you not interpenetrate?
must he not interpenetrate?
must we not interpenetrate?
must you not interpenetrate?
must they not interpenetrate? 	must I not be interpenetrating?
must you not be interpenetrating?
must he not be interpenetrating?
must we not be interpenetrating?
must you not be interpenetrating?
must they not be interpenetrating? 	must I not have interpenetrated?
must you not have interpenetrated?
must he not have interpenetrated?
must we not have interpenetrated?
must you not have interpenetrated?
must they not have interpenetrated? 	must I not have been interpenetrating?
must you not have been interpenetrating?
must he not have been interpenetrating?
must we not have been interpenetrating?
must you not have been interpenetrating?
must they not have been interpenetrating?