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 couldn't fulminate you couldn't fulminate he couldn't fulminate we couldn't fulminate you couldn't fulminate they couldn't fulminate
V-ing form
I couldn't be fulminating you couldn't be fulminating he couldn't be fulminating we couldn't be fulminating you couldn't be fulminating they couldn't be fulminating
Perfect
I couldn't have fulminated you couldn't have fulminated he couldn't have fulminated we couldn't have fulminated you couldn't have fulminated they couldn't have fulminated
V-ing perfect
I couldn't have been fulminating you couldn't have been fulminating he couldn't have been fulminating we couldn't have been fulminating you couldn't have been fulminating they couldn't 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
couldn't I fulminate? couldn't you fulminate? couldn't he fulminate? couldn't we fulminate? couldn't you fulminate? couldn't they fulminate?
V-ing form
couldn't I be fulminating? couldn't you be fulminating? couldn't he be fulminating? couldn't we be fulminating? couldn't you be fulminating? couldn't they be fulminating?
Perfect
couldn't I have fulminated? couldn't you have fulminated? couldn't he have fulminated? couldn't we have fulminated? couldn't you have fulminated? couldn't they have fulminated?
V-ing perfect
couldn't I have been fulminating? couldn't you have been fulminating? couldn't he have been fulminating? couldn't we have been fulminating? couldn't you have been fulminating? couldn't they have been fulminating?