I could whittle you could whittle he could whittle we could whittle you could whittle they could whittle
V-ing form
I could be whittling you could be whittling he could be whittling we could be whittling you could be whittling they could be whittling
Perfect
I could have whittled you could have whittled he could have whittled we could have whittled you could have whittled they could have whittled
V-ing perfect
I could have been whittling you could have been whittling he could have been whittling we could have been whittling you could have been whittling they could have been whittling
Negation
Simple form
I could not whittle you could not whittle he could not whittle we could not whittle you could not whittle they could not whittle
V-ing form
I could not be whittling you could not be whittling he could not be whittling we could not be whittling you could not be whittling they could not be whittling
Perfect
I could not have whittled you could not have whittled he could not have whittled we could not have whittled you could not have whittled they could not have whittled
V-ing perfect
I could not have been whittling you could not have been whittling he could not have been whittling we could not have been whittling you could not have been whittling they could not have been whittling
Interrogative form
Simple form
could I whittle? could you whittle? could he whittle? could we whittle? could you whittle? could they whittle?
V-ing form
could I be whittling? could you be whittling? could he be whittling? could we be whittling? could you be whittling? could they be whittling?
Perfect
could I have whittled? could you have whittled? could he have whittled? could we have whittled? could you have whittled? could they have whittled?
V-ing perfect
could I have been whittling? could you have been whittling? could he have been whittling? could we have been whittling? could you have been whittling? could they have been whittling?
Interro-negative form
Simple form
could I not whittle? could you not whittle? could he not whittle? could we not whittle? could you not whittle? could they not whittle?
V-ing form
could I not be whittling? could you not be whittling? could he not be whittling? could we not be whittling? could you not be whittling? could they not be whittling?
Perfect
could I not have whittled? could you not have whittled? could he not have whittled? could we not have whittled? could you not have whittled? could they not have whittled?
V-ing perfect
could I not have been whittling? could you not have been whittling? could he not have been whittling? could we not have been whittling? could you not have been whittling? could they not have been whittling?