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 couldn't amount you couldn't amount he couldn't amount we couldn't amount you couldn't amount they couldn't amount
V-ing form
I couldn't be amounting you couldn't be amounting he couldn't be amounting we couldn't be amounting you couldn't be amounting they couldn't be amounting
Perfect
I couldn't have amounted you couldn't have amounted he couldn't have amounted we couldn't have amounted you couldn't have amounted they couldn't have amounted
V-ing perfect
I couldn't have been amounting you couldn't have been amounting he couldn't have been amounting we couldn't have been amounting you couldn't have been amounting they couldn't 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
couldn't I amount? couldn't you amount? couldn't he amount? couldn't we amount? couldn't you amount? couldn't they amount?
V-ing form
couldn't I be amounting? couldn't you be amounting? couldn't he be amounting? couldn't we be amounting? couldn't you be amounting? couldn't they be amounting?
Perfect
couldn't I have amounted? couldn't you have amounted? couldn't he have amounted? couldn't we have amounted? couldn't you have amounted? couldn't they have amounted?
V-ing perfect
couldn't I have been amounting? couldn't you have been amounting? couldn't he have been amounting? couldn't we have been amounting? couldn't you have been amounting? couldn't they have been amounting?