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 couldn't furl you couldn't furl he couldn't furl we couldn't furl you couldn't furl they couldn't furl	I couldn't be furling you couldn't be furling he couldn't be furling we couldn't be furling you couldn't be furling they couldn't be furling
Perfect	V-ing perfect
I couldn't have furled you couldn't have furled he couldn't have furled we couldn't have furled you couldn't have furled they couldn't have furled	I couldn't have been furling you couldn't have been furling he couldn't have been furling we couldn't have been furling you couldn't have been furling they couldn't 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
couldn't I furl? couldn't you furl? couldn't he furl? couldn't we furl? couldn't you furl? couldn't they furl?	couldn't I be furling? couldn't you be furling? couldn't he be furling? couldn't we be furling? couldn't you be furling? couldn't they be furling?
Perfect	V-ing perfect
couldn't I have furled? couldn't you have furled? couldn't he have furled? couldn't we have furled? couldn't you have furled? couldn't they have furled?	couldn't I have been furling? couldn't you have been furling? couldn't he have been furling? couldn't we have been furling? couldn't you have been furling? couldn't they have been furling?