must benefit
Regular verb: benefit - benefited- benefited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must benefit
you must benefit
he must benefit
we must benefit
you must benefit
they must benefit 	I must be benefiting
you must be benefiting
he must be benefiting
we must be benefiting
you must be benefiting
they must be benefiting	I must have benefited
you must have benefited
he must have benefited
we must have benefited
you must have benefited
they must have benefited	I must have been benefiting
you must have been benefiting
he must have been benefiting
we must have been benefiting
you must have been benefiting
they must have been benefiting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not benefit
you must not benefit
he must not benefit
we must not benefit
you must not benefit
they must not benefit 	I must not be benefiting
you must not be benefiting
he must not be benefiting
we must not be benefiting
you must not be benefiting
they must not be benefiting	I must not have benefited
you must not have benefited
he must not have benefited
we must not have benefited
you must not have benefited
they must not have benefited	I must not have been benefiting
you must not have been benefiting
he must not have been benefiting
we must not have been benefiting
you must not have been benefiting
they must not have been benefiting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I benefit?
must you benefit?
must he benefit?
must we benefit?
must you benefit?
must they benefit? 	must I be benefiting?
must you be benefiting?
must he be benefiting?
must we be benefiting?
must you be benefiting?
must they be benefiting? 	must I have benefited?
must you have benefited?
must he have benefited?
must we have benefited?
must you have benefited?
must they have benefited? 	must I have been benefiting?
must you have been benefiting?
must he have been benefiting?
must we have been benefiting?
must you have been benefiting?
must they have been benefiting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not benefit?
must you not benefit?
must he not benefit?
must we not benefit?
must you not benefit?
must they not benefit? 	must I not be benefiting?
must you not be benefiting?
must he not be benefiting?
must we not be benefiting?
must you not be benefiting?
must they not be benefiting? 	must I not have benefited?
must you not have benefited?
must he not have benefited?
must we not have benefited?
must you not have benefited?
must they not have benefited? 	must I not have been benefiting?
must you not have been benefiting?
must he not have been benefiting?
must we not have been benefiting?
must you not have been benefiting?
must they not have been benefiting?