I could caterwaul you could caterwaul she could caterwaul we could caterwaul you could caterwaul they could caterwaul
V-ing form
I could be caterwauling you could be caterwauling she could be caterwauling we could be caterwauling you could be caterwauling they could be caterwauling
Perfect
I could have caterwauled you could have caterwauled she could have caterwauled we could have caterwauled you could have caterwauled they could have caterwauled
V-ing perfect
I could have been caterwauling you could have been caterwauling she could have been caterwauling we could have been caterwauling you could have been caterwauling they could have been caterwauling
Negation
Simple form
I could not caterwaul you could not caterwaul she could not caterwaul we could not caterwaul you could not caterwaul they could not caterwaul
V-ing form
I could not be caterwauling you could not be caterwauling she could not be caterwauling we could not be caterwauling you could not be caterwauling they could not be caterwauling
Perfect
I could not have caterwauled you could not have caterwauled she could not have caterwauled we could not have caterwauled you could not have caterwauled they could not have caterwauled
V-ing perfect
I could not have been caterwauling you could not have been caterwauling she could not have been caterwauling we could not have been caterwauling you could not have been caterwauling they could not have been caterwauling
Interrogative form
Simple form
could I caterwaul? could you caterwaul? could she caterwaul? could we caterwaul? could you caterwaul? could they caterwaul?
V-ing form
could I be caterwauling? could you be caterwauling? could she be caterwauling? could we be caterwauling? could you be caterwauling? could they be caterwauling?
Perfect
could I have caterwauled? could you have caterwauled? could she have caterwauled? could we have caterwauled? could you have caterwauled? could they have caterwauled?
V-ing perfect
could I have been caterwauling? could you have been caterwauling? could she have been caterwauling? could we have been caterwauling? could you have been caterwauling? could they have been caterwauling?
Interro-negative form
Simple form
could I not caterwaul? could you not caterwaul? could she not caterwaul? could we not caterwaul? could you not caterwaul? could they not caterwaul?
V-ing form
could I not be caterwauling? could you not be caterwauling? could she not be caterwauling? could we not be caterwauling? could you not be caterwauling? could they not be caterwauling?
Perfect
could I not have caterwauled? could you not have caterwauled? could she not have caterwauled? could we not have caterwauled? could you not have caterwauled? could they not have caterwauled?
V-ing perfect
could I not have been caterwauling? could you not have been caterwauling? could she not have been caterwauling? could we not have been caterwauling? could you not have been caterwauling? could they not have been caterwauling?