English verb conjugation
COULD FURL

Regular verb: furl - furled - furled

Affirmation

Simple form	V-ing form
I could furl you could furl he could furl we could furl you could furl they could furl	I could be furling you could be furling he could be furling we could be furling you could be furling they could be furling
Perfect	V-ing perfect
I could have furled you could have furled he could have furled we could have furled you could have furled they could have furled	I could have been furling you could have been furling he could have been furling we could have been furling you could have been furling they could have been furling

Negation

Simple form	V-ing form
I could not furl you could not furl he could not furl we could not furl you could not furl they could not furl	I could not be furling you could not be furling he could not be furling we could not be furling you could not be furling they could not be furling
Perfect	V-ing perfect
I could not have furled you could not have furled he could not have furled we could not have furled you could not have furled they could not have furled	I could not have been furling you could not have been furling he could not have been furling we could not have been furling you could not have been furling they could not have been furling

Interrogative form

Simple form	V-ing form
could I furl? could you furl? could he furl? could we furl? could you furl? could they furl?	could I be furling? could you be furling? could he be furling? could we be furling? could you be furling? could they be furling?
Perfect	V-ing perfect
could I have furled? could you have furled? could he have furled? could we have furled? could you have furled? could they have furled?	could I have been furling? could you have been furling? could he have been furling? could we have been furling? could you have been furling? could they have been furling?

Interro-negative form

Simple form	V-ing form
could I not furl? could you not furl? could he not furl? could we not furl? could you not furl? could they not furl?	could I not be furling? could you not be furling? could he not be furling? could we not be furling? could you not be furling? could they not be furling?
Perfect	V-ing perfect
could I not have furled? could you not have furled? could he not have furled? could we not have furled? could you not have furled? could they not have furled?	could I not have been furling? could you not have been furling? could he not have been furling? could we not have been furling? could you not have been furling? could they not have been furling?