I could fulminate you could fulminate he could fulminate we could fulminate you could fulminate they could fulminate
V-ing form
I could be fulminating you could be fulminating he could be fulminating we could be fulminating you could be fulminating they could be fulminating
Perfect
I could have fulminated you could have fulminated he could have fulminated we could have fulminated you could have fulminated they could have fulminated
V-ing perfect
I could have been fulminating you could have been fulminating he could have been fulminating we could have been fulminating you could have been fulminating they could have been fulminating
Negation
Simple form
I could not fulminate you could not fulminate he could not fulminate we could not fulminate you could not fulminate they could not fulminate
V-ing form
I could not be fulminating you could not be fulminating he could not be fulminating we could not be fulminating you could not be fulminating they could not be fulminating
Perfect
I could not have fulminated you could not have fulminated he could not have fulminated we could not have fulminated you could not have fulminated they could not have fulminated
V-ing perfect
I could not have been fulminating you could not have been fulminating he could not have been fulminating we could not have been fulminating you could not have been fulminating they could not have been fulminating
Interrogative form
Simple form
could I fulminate? could you fulminate? could he fulminate? could we fulminate? could you fulminate? could they fulminate?
V-ing form
could I be fulminating? could you be fulminating? could he be fulminating? could we be fulminating? could you be fulminating? could they be fulminating?
Perfect
could I have fulminated? could you have fulminated? could he have fulminated? could we have fulminated? could you have fulminated? could they have fulminated?
V-ing perfect
could I have been fulminating? could you have been fulminating? could he have been fulminating? could we have been fulminating? could you have been fulminating? could they have been fulminating?
Interro-negative form
Simple form
could I not fulminate? could you not fulminate? could he not fulminate? could we not fulminate? could you not fulminate? could they not fulminate?
V-ing form
could I not be fulminating? could you not be fulminating? could he not be fulminating? could we not be fulminating? could you not be fulminating? could they not be fulminating?
Perfect
could I not have fulminated? could you not have fulminated? could he not have fulminated? could we not have fulminated? could you not have fulminated? could they not have fulminated?
V-ing perfect
could I not have been fulminating? could you not have been fulminating? could he not have been fulminating? could we not have been fulminating? could you not have been fulminating? could they not have been fulminating?