must retool
Regular verb: retool - retooled- retooled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must retool
you must retool
he must retool
we must retool
you must retool
they must retool 	I must be retooling
you must be retooling
he must be retooling
we must be retooling
you must be retooling
they must be retooling	I must have retooled
you must have retooled
he must have retooled
we must have retooled
you must have retooled
they must have retooled	I must have been retooling
you must have been retooling
he must have been retooling
we must have been retooling
you must have been retooling
they must have been retooling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not retool
you must not retool
he must not retool
we must not retool
you must not retool
they must not retool 	I must not be retooling
you must not be retooling
he must not be retooling
we must not be retooling
you must not be retooling
they must not be retooling	I must not have retooled
you must not have retooled
he must not have retooled
we must not have retooled
you must not have retooled
they must not have retooled	I must not have been retooling
you must not have been retooling
he must not have been retooling
we must not have been retooling
you must not have been retooling
they must not have been retooling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I retool?
must you retool?
must he retool?
must we retool?
must you retool?
must they retool? 	must I be retooling?
must you be retooling?
must he be retooling?
must we be retooling?
must you be retooling?
must they be retooling? 	must I have retooled?
must you have retooled?
must he have retooled?
must we have retooled?
must you have retooled?
must they have retooled? 	must I have been retooling?
must you have been retooling?
must he have been retooling?
must we have been retooling?
must you have been retooling?
must they have been retooling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not retool?
must you not retool?
must he not retool?
must we not retool?
must you not retool?
must they not retool? 	must I not be retooling?
must you not be retooling?
must he not be retooling?
must we not be retooling?
must you not be retooling?
must they not be retooling? 	must I not have retooled?
must you not have retooled?
must he not have retooled?
must we not have retooled?
must you not have retooled?
must they not have retooled? 	must I not have been retooling?
must you not have been retooling?
must he not have been retooling?
must we not have been retooling?
must you not have been retooling?
must they not have been retooling?