should endow
Regular verb: endow - endowed- endowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd endow
you'd endow
she'd endow
we'd endow
you'd endow
they'd endow 	I'd be endowing
you'd be endowing
she'd be endowing
we'd be endowing
you'd be endowing
they'd be endowing	I should've endowed
you should've endowed
she 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
she 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
she 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
she 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
she 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
she 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 she endow?
should we endow?
should you endow?
should they endow? 	should I be endowing?
should you be endowing?
should she be endowing?
should we be endowing?
should you be endowing?
should they be endowing? 	should I have endowed?
should you have endowed?
should she 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 she 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 she 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 she 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 she 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 she have been endowing?
shouldn't we have been endowing?
shouldn't you have been endowing?
shouldn't they have been endowing?