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 could not weasel you could not weasel he could not weasel we could not weasel you could not weasel they could not weasel
V-ing form
I could not be weaseling you could not be weaseling he could not be weaseling we could not be weaseling you could not be weaseling they could not be weaseling
Perfect
I could not have weaseled you could not have weaseled he could not have weaseled we could not have weaseled you could not have weaseled they could not have weaseled
V-ing perfect
I could not have been weaseling you could not have been weaseling he could not have been weaseling we could not have been weaseling you could not have been weaseling they could not 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
could I not weasel? could you not weasel? could he not weasel? could we not weasel? could you not weasel? could they not weasel?
V-ing form
could I not be weaseling? could you not be weaseling? could he not be weaseling? could we not be weaseling? could you not be weaseling? could they not be weaseling?
Perfect
could I not have weaseled? could you not have weaseled? could he not have weaseled? could we not have weaseled? could you not have weaseled? could they not have weaseled?
V-ing perfect
could I not have been weaseling? could you not have been weaseling? could he not have been weaseling? could we not have been weaseling? could you not have been weaseling? could they not have been weaseling?