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