I could wintle you could wintle she could wintle we could wintle you could wintle they could wintle
V-ing form
I could be wintling you could be wintling she could be wintling we could be wintling you could be wintling they could be wintling
Perfect
I could have wintled you could have wintled she could have wintled we could have wintled you could have wintled they could have wintled
V-ing perfect
I could have been wintling you could have been wintling she could have been wintling we could have been wintling you could have been wintling they could have been wintling
Negation
Simple form
I could not wintle you could not wintle she could not wintle we could not wintle you could not wintle they could not wintle
V-ing form
I could not be wintling you could not be wintling she could not be wintling we could not be wintling you could not be wintling they could not be wintling
Perfect
I could not have wintled you could not have wintled she could not have wintled we could not have wintled you could not have wintled they could not have wintled
V-ing perfect
I could not have been wintling you could not have been wintling she could not have been wintling we could not have been wintling you could not have been wintling they could not have been wintling
Interrogative form
Simple form
could I wintle? could you wintle? could she wintle? could we wintle? could you wintle? could they wintle?
V-ing form
could I be wintling? could you be wintling? could she be wintling? could we be wintling? could you be wintling? could they be wintling?
Perfect
could I have wintled? could you have wintled? could she have wintled? could we have wintled? could you have wintled? could they have wintled?
V-ing perfect
could I have been wintling? could you have been wintling? could she have been wintling? could we have been wintling? could you have been wintling? could they have been wintling?
Interro-negative form
Simple form
could I not wintle? could you not wintle? could she not wintle? could we not wintle? could you not wintle? could they not wintle?
V-ing form
could I not be wintling? could you not be wintling? could she not be wintling? could we not be wintling? could you not be wintling? could they not be wintling?
Perfect
could I not have wintled? could you not have wintled? could she not have wintled? could we not have wintled? could you not have wintled? could they not have wintled?
V-ing perfect
could I not have been wintling? could you not have been wintling? could she not have been wintling? could we not have been wintling? could you not have been wintling? could they not have been wintling?