I could amount you could amount he could amount we could amount you could amount they could amount
V-ing form
I could be amounting you could be amounting he could be amounting we could be amounting you could be amounting they could be amounting
Perfect
I could have amounted you could have amounted he could have amounted we could have amounted you could have amounted they could have amounted
V-ing perfect
I could have been amounting you could have been amounting he could have been amounting we could have been amounting you could have been amounting they could have been amounting
Negation
Simple form
I could not amount you could not amount he could not amount we could not amount you could not amount they could not amount
V-ing form
I could not be amounting you could not be amounting he could not be amounting we could not be amounting you could not be amounting they could not be amounting
Perfect
I could not have amounted you could not have amounted he could not have amounted we could not have amounted you could not have amounted they could not have amounted
V-ing perfect
I could not have been amounting you could not have been amounting he could not have been amounting we could not have been amounting you could not have been amounting they could not have been amounting
Interrogative form
Simple form
could I amount? could you amount? could he amount? could we amount? could you amount? could they amount?
V-ing form
could I be amounting? could you be amounting? could he be amounting? could we be amounting? could you be amounting? could they be amounting?
Perfect
could I have amounted? could you have amounted? could he have amounted? could we have amounted? could you have amounted? could they have amounted?
V-ing perfect
could I have been amounting? could you have been amounting? could he have been amounting? could we have been amounting? could you have been amounting? could they have been amounting?
Interro-negative form
Simple form
could I not amount? could you not amount? could he not amount? could we not amount? could you not amount? could they not amount?
V-ing form
could I not be amounting? could you not be amounting? could he not be amounting? could we not be amounting? could you not be amounting? could they not be amounting?
Perfect
could I not have amounted? could you not have amounted? could he not have amounted? could we not have amounted? could you not have amounted? could they not have amounted?
V-ing perfect
could I not have been amounting? could you not have been amounting? could he not have been amounting? could we not have been amounting? could you not have been amounting? could they not have been amounting?