English verb conjugation
COULD FUME

Regular verb: fume - fumed - fumed

Affirmation

Simple form	V-ing form
I could fume you could fume he could fume we could fume you could fume they could fume	I could be fuming you could be fuming he could be fuming we could be fuming you could be fuming they could be fuming
Perfect	V-ing perfect
I could have fumed you could have fumed he could have fumed we could have fumed you could have fumed they could have fumed	I could have been fuming you could have been fuming he could have been fuming we could have been fuming you could have been fuming they could have been fuming

Negation

Simple form	V-ing form
I couldn't fume you couldn't fume he couldn't fume we couldn't fume you couldn't fume they couldn't fume	I couldn't be fuming you couldn't be fuming he couldn't be fuming we couldn't be fuming you couldn't be fuming they couldn't be fuming
Perfect	V-ing perfect
I couldn't have fumed you couldn't have fumed he couldn't have fumed we couldn't have fumed you couldn't have fumed they couldn't have fumed	I couldn't have been fuming you couldn't have been fuming he couldn't have been fuming we couldn't have been fuming you couldn't have been fuming they couldn't have been fuming

Interrogative form

Simple form	V-ing form
could I fume? could you fume? could he fume? could we fume? could you fume? could they fume?	could I be fuming? could you be fuming? could he be fuming? could we be fuming? could you be fuming? could they be fuming?
Perfect	V-ing perfect
could I have fumed? could you have fumed? could he have fumed? could we have fumed? could you have fumed? could they have fumed?	could I have been fuming? could you have been fuming? could he have been fuming? could we have been fuming? could you have been fuming? could they have been fuming?

Interro-negative form

Simple form	V-ing form
couldn't I fume? couldn't you fume? couldn't he fume? couldn't we fume? couldn't you fume? couldn't they fume?	couldn't I be fuming? couldn't you be fuming? couldn't he be fuming? couldn't we be fuming? couldn't you be fuming? couldn't they be fuming?
Perfect	V-ing perfect
couldn't I have fumed? couldn't you have fumed? couldn't he have fumed? couldn't we have fumed? couldn't you have fumed? couldn't they have fumed?	couldn't I have been fuming? couldn't you have been fuming? couldn't he have been fuming? couldn't we have been fuming? couldn't you have been fuming? couldn't they have been fuming?