I could surmount you could surmount she could surmount we could surmount you could surmount they could surmount
V-ing form
I could be surmounting you could be surmounting she could be surmounting we could be surmounting you could be surmounting they could be surmounting
Perfect
I could have surmounted you could have surmounted she could have surmounted we could have surmounted you could have surmounted they could have surmounted
V-ing perfect
I could have been surmounting you could have been surmounting she could have been surmounting we could have been surmounting you could have been surmounting they could have been surmounting
Negation
Simple form
I could not surmount you could not surmount she could not surmount we could not surmount you could not surmount they could not surmount
V-ing form
I could not be surmounting you could not be surmounting she could not be surmounting we could not be surmounting you could not be surmounting they could not be surmounting
Perfect
I could not have surmounted you could not have surmounted she could not have surmounted we could not have surmounted you could not have surmounted they could not have surmounted
V-ing perfect
I could not have been surmounting you could not have been surmounting she could not have been surmounting we could not have been surmounting you could not have been surmounting they could not have been surmounting
Interrogative form
Simple form
could I surmount? could you surmount? could she surmount? could we surmount? could you surmount? could they surmount?
V-ing form
could I be surmounting? could you be surmounting? could she be surmounting? could we be surmounting? could you be surmounting? could they be surmounting?
Perfect
could I have surmounted? could you have surmounted? could she have surmounted? could we have surmounted? could you have surmounted? could they have surmounted?
V-ing perfect
could I have been surmounting? could you have been surmounting? could she have been surmounting? could we have been surmounting? could you have been surmounting? could they have been surmounting?
Interro-negative form
Simple form
could I not surmount? could you not surmount? could she not surmount? could we not surmount? could you not surmount? could they not surmount?
V-ing form
could I not be surmounting? could you not be surmounting? could she not be surmounting? could we not be surmounting? could you not be surmounting? could they not be surmounting?
Perfect
could I not have surmounted? could you not have surmounted? could she not have surmounted? could we not have surmounted? could you not have surmounted? could they not have surmounted?
V-ing perfect
could I not have been surmounting? could you not have been surmounting? could she not have been surmounting? could we not have been surmounting? could you not have been surmounting? could they not have been surmounting?