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