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 couldn't caterwaul you couldn't caterwaul she couldn't caterwaul we couldn't caterwaul you couldn't caterwaul they couldn't caterwaul
V-ing form
I couldn't be caterwauling you couldn't be caterwauling she couldn't be caterwauling we couldn't be caterwauling you couldn't be caterwauling they couldn't be caterwauling
Perfect
I couldn't have caterwauled you couldn't have caterwauled she couldn't have caterwauled we couldn't have caterwauled you couldn't have caterwauled they couldn't have caterwauled
V-ing perfect
I couldn't have been caterwauling you couldn't have been caterwauling she couldn't have been caterwauling we couldn't have been caterwauling you couldn't have been caterwauling they couldn't 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
couldn't I caterwaul? couldn't you caterwaul? couldn't she caterwaul? couldn't we caterwaul? couldn't you caterwaul? couldn't they caterwaul?
V-ing form
couldn't I be caterwauling? couldn't you be caterwauling? couldn't she be caterwauling? couldn't we be caterwauling? couldn't you be caterwauling? couldn't they be caterwauling?
Perfect
couldn't I have caterwauled? couldn't you have caterwauled? couldn't she have caterwauled? couldn't we have caterwauled? couldn't you have caterwauled? couldn't they have caterwauled?
V-ing perfect
couldn't I have been caterwauling? couldn't you have been caterwauling? couldn't she have been caterwauling? couldn't we have been caterwauling? couldn't you have been caterwauling? couldn't they have been caterwauling?