must endow
Regular verb: endow - endowed- endowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must endow
you must endow
he must endow
we must endow
you must endow
they must endow 	I must be endowing
you must be endowing
he must be endowing
we must be endowing
you must be endowing
they must be endowing	I must have endowed
you must have endowed
he must have endowed
we must have endowed
you must have endowed
they must have endowed	I must have been endowing
you must have been endowing
he must have been endowing
we must have been endowing
you must have been endowing
they must have been endowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not endow
you must not endow
he must not endow
we must not endow
you must not endow
they must not endow 	I must not be endowing
you must not be endowing
he must not be endowing
we must not be endowing
you must not be endowing
they must not be endowing	I must not have endowed
you must not have endowed
he must not have endowed
we must not have endowed
you must not have endowed
they must not have endowed	I must not have been endowing
you must not have been endowing
he must not have been endowing
we must not have been endowing
you must not have been endowing
they must not have been endowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I endow?
must you endow?
must he endow?
must we endow?
must you endow?
must they endow? 	must I be endowing?
must you be endowing?
must he be endowing?
must we be endowing?
must you be endowing?
must they be endowing? 	must I have endowed?
must you have endowed?
must he have endowed?
must we have endowed?
must you have endowed?
must they have endowed? 	must I have been endowing?
must you have been endowing?
must he have been endowing?
must we have been endowing?
must you have been endowing?
must they have been endowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not endow?
must you not endow?
must he not endow?
must we not endow?
must you not endow?
must they not endow? 	must I not be endowing?
must you not be endowing?
must he not be endowing?
must we not be endowing?
must you not be endowing?
must they not be endowing? 	must I not have endowed?
must you not have endowed?
must he not have endowed?
must we not have endowed?
must you not have endowed?
must they not have endowed? 	must I not have been endowing?
must you not have been endowing?
must he not have been endowing?
must we not have been endowing?
must you not have been endowing?
must they not have been endowing?