I could whirl you could whirl he could whirl we could whirl you could whirl they could whirl
V-ing form
I could be whirling you could be whirling he could be whirling we could be whirling you could be whirling they could be whirling
Perfect
I could have whirled you could have whirled he could have whirled we could have whirled you could have whirled they could have whirled
V-ing perfect
I could have been whirling you could have been whirling he could have been whirling we could have been whirling you could have been whirling they could have been whirling
Negation
Simple form
I could not whirl you could not whirl he could not whirl we could not whirl you could not whirl they could not whirl
V-ing form
I could not be whirling you could not be whirling he could not be whirling we could not be whirling you could not be whirling they could not be whirling
Perfect
I could not have whirled you could not have whirled he could not have whirled we could not have whirled you could not have whirled they could not have whirled
V-ing perfect
I could not have been whirling you could not have been whirling he could not have been whirling we could not have been whirling you could not have been whirling they could not have been whirling
Interrogative form
Simple form
could I whirl? could you whirl? could he whirl? could we whirl? could you whirl? could they whirl?
V-ing form
could I be whirling? could you be whirling? could he be whirling? could we be whirling? could you be whirling? could they be whirling?
Perfect
could I have whirled? could you have whirled? could he have whirled? could we have whirled? could you have whirled? could they have whirled?
V-ing perfect
could I have been whirling? could you have been whirling? could he have been whirling? could we have been whirling? could you have been whirling? could they have been whirling?
Interro-negative form
Simple form
could I not whirl? could you not whirl? could he not whirl? could we not whirl? could you not whirl? could they not whirl?
V-ing form
could I not be whirling? could you not be whirling? could he not be whirling? could we not be whirling? could you not be whirling? could they not be whirling?
Perfect
could I not have whirled? could you not have whirled? could he not have whirled? could we not have whirled? could you not have whirled? could they not have whirled?
V-ing perfect
could I not have been whirling? could you not have been whirling? could he not have been whirling? could we not have been whirling? could you not have been whirling? could they not have been whirling?