I could subrogate you could subrogate he could subrogate we could subrogate you could subrogate they could subrogate
V-ing form
I could be subrogating you could be subrogating he could be subrogating we could be subrogating you could be subrogating they could be subrogating
Perfect
I could have subrogated you could have subrogated he could have subrogated we could have subrogated you could have subrogated they could have subrogated
V-ing perfect
I could have been subrogating you could have been subrogating he could have been subrogating we could have been subrogating you could have been subrogating they could have been subrogating
Negation
Simple form
I could not subrogate you could not subrogate he could not subrogate we could not subrogate you could not subrogate they could not subrogate
V-ing form
I could not be subrogating you could not be subrogating he could not be subrogating we could not be subrogating you could not be subrogating they could not be subrogating
Perfect
I could not have subrogated you could not have subrogated he could not have subrogated we could not have subrogated you could not have subrogated they could not have subrogated
V-ing perfect
I could not have been subrogating you could not have been subrogating he could not have been subrogating we could not have been subrogating you could not have been subrogating they could not have been subrogating
Interrogative form
Simple form
could I subrogate? could you subrogate? could he subrogate? could we subrogate? could you subrogate? could they subrogate?
V-ing form
could I be subrogating? could you be subrogating? could he be subrogating? could we be subrogating? could you be subrogating? could they be subrogating?
Perfect
could I have subrogated? could you have subrogated? could he have subrogated? could we have subrogated? could you have subrogated? could they have subrogated?
V-ing perfect
could I have been subrogating? could you have been subrogating? could he have been subrogating? could we have been subrogating? could you have been subrogating? could they have been subrogating?
Interro-negative form
Simple form
could I not subrogate? could you not subrogate? could he not subrogate? could we not subrogate? could you not subrogate? could they not subrogate?
V-ing form
could I not be subrogating? could you not be subrogating? could he not be subrogating? could we not be subrogating? could you not be subrogating? could they not be subrogating?
Perfect
could I not have subrogated? could you not have subrogated? could he not have subrogated? could we not have subrogated? could you not have subrogated? could they not have subrogated?
V-ing perfect
could I not have been subrogating? could you not have been subrogating? could he not have been subrogating? could we not have been subrogating? could you not have been subrogating? could they not have been subrogating?