English verb conjugation
COULD CATERWAUL

Regular verb: caterwaul - caterwauled - caterwauled

Affirmation

Simple form	V-ing form
I could caterwaul you could caterwaul he could caterwaul we could caterwaul you could caterwaul they could caterwaul	I could be caterwauling you could be caterwauling he could be caterwauling we could be caterwauling you could be caterwauling they could be caterwauling
Perfect	V-ing perfect
I could have caterwauled you could have caterwauled he could have caterwauled we could have caterwauled you could have caterwauled they could have caterwauled	I could have been caterwauling you could have been caterwauling he could have been caterwauling we could have been caterwauling you could have been caterwauling they could have been caterwauling

Negation

Simple form	V-ing form
I could not caterwaul you could not caterwaul he could not caterwaul we could not caterwaul you could not caterwaul they could not caterwaul	I could not be caterwauling you could not be caterwauling he could not be caterwauling we could not be caterwauling you could not be caterwauling they could not be caterwauling
Perfect	V-ing perfect
I could not have caterwauled you could not have caterwauled he could not have caterwauled we could not have caterwauled you could not have caterwauled they could not have caterwauled	I could not have been caterwauling you could not have been caterwauling he 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	V-ing form
could I caterwaul? could you caterwaul? could he caterwaul? could we caterwaul? could you caterwaul? could they caterwaul?	could I be caterwauling? could you be caterwauling? could he be caterwauling? could we be caterwauling? could you be caterwauling? could they be caterwauling?
Perfect	V-ing perfect
could I have caterwauled? could you have caterwauled? could he have caterwauled? could we have caterwauled? could you have caterwauled? could they have caterwauled?	could I have been caterwauling? could you have been caterwauling? could he have been caterwauling? could we have been caterwauling? could you have been caterwauling? could they have been caterwauling?

Interro-negative form

Simple form	V-ing form
could I not caterwaul? could you not caterwaul? could he not caterwaul? could we not caterwaul? could you not caterwaul? could they not caterwaul?	could I not be caterwauling? could you not be caterwauling? could he not be caterwauling? could we not be caterwauling? could you not be caterwauling? could they not be caterwauling?
Perfect	V-ing perfect
could I not have caterwauled? could you not have caterwauled? could he not have caterwauled? could we not have caterwauled? could you not have caterwauled? could they not have caterwauled?	could I not have been caterwauling? could you not have been caterwauling? could he not have been caterwauling? could we not have been caterwauling? could you not have been caterwauling? could they not have been caterwauling?