I could caddy you could caddy he could caddy we could caddy you could caddy they could caddy
V-ing form
I could be caddying you could be caddying he could be caddying we could be caddying you could be caddying they could be caddying
Perfect
I could have caddied you could have caddied he could have caddied we could have caddied you could have caddied they could have caddied
V-ing perfect
I could have been caddying you could have been caddying he could have been caddying we could have been caddying you could have been caddying they could have been caddying
Negation
Simple form
I couldn't caddy you couldn't caddy he couldn't caddy we couldn't caddy you couldn't caddy they couldn't caddy
V-ing form
I couldn't be caddying you couldn't be caddying he couldn't be caddying we couldn't be caddying you couldn't be caddying they couldn't be caddying
Perfect
I couldn't have caddied you couldn't have caddied he couldn't have caddied we couldn't have caddied you couldn't have caddied they couldn't have caddied
V-ing perfect
I couldn't have been caddying you couldn't have been caddying he couldn't have been caddying we couldn't have been caddying you couldn't have been caddying they couldn't have been caddying
Interrogative form
Simple form
could I caddy? could you caddy? could he caddy? could we caddy? could you caddy? could they caddy?
V-ing form
could I be caddying? could you be caddying? could he be caddying? could we be caddying? could you be caddying? could they be caddying?
Perfect
could I have caddied? could you have caddied? could he have caddied? could we have caddied? could you have caddied? could they have caddied?
V-ing perfect
could I have been caddying? could you have been caddying? could he have been caddying? could we have been caddying? could you have been caddying? could they have been caddying?
Interro-negative form
Simple form
couldn't I caddy? couldn't you caddy? couldn't he caddy? couldn't we caddy? couldn't you caddy? couldn't they caddy?
V-ing form
couldn't I be caddying? couldn't you be caddying? couldn't he be caddying? couldn't we be caddying? couldn't you be caddying? couldn't they be caddying?
Perfect
couldn't I have caddied? couldn't you have caddied? couldn't he have caddied? couldn't we have caddied? couldn't you have caddied? couldn't they have caddied?
V-ing perfect
couldn't I have been caddying? couldn't you have been caddying? couldn't he have been caddying? couldn't we have been caddying? couldn't you have been caddying? couldn't they have been caddying?