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