should endow
Regular verb: endow - endowed- endowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd endow
you'd endow
he'd endow
we'd endow
you'd endow
they'd endow 	I'd be endowing
you'd be endowing
he'd be endowing
we'd be endowing
you'd be endowing
they'd be endowing	I should've endowed
you should've endowed
he should've endowed
we should've endowed
you should've endowed
they should've endowed	I should've been endowing
you should've been endowing
he should've been endowing
we should've been endowing
you should've been endowing
they should've been endowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't endow
you shouldn't endow
he shouldn't endow
we shouldn't endow
you shouldn't endow
they shouldn't endow 	I shouldn't be endowing
you shouldn't be endowing
he shouldn't be endowing
we shouldn't be endowing
you shouldn't be endowing
they shouldn't be endowing	I shouldn't have endowed
you shouldn't have endowed
he shouldn't have endowed
we shouldn't have endowed
you shouldn't have endowed
they shouldn't have endowed	I shouldn't have been endowing
you shouldn't have been endowing
he shouldn't have been endowing
we shouldn't have been endowing
you shouldn't have been endowing
they shouldn't have been endowing	

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

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