English verb conjugation
COULD FUSE

Regular verb: fuse - fused - fused

Affirmation

Simple form	V-ing form
I could fuse you could fuse she could fuse we could fuse you could fuse they could fuse	I could be fusing you could be fusing she could be fusing we could be fusing you could be fusing they could be fusing
Perfect	V-ing perfect
I could have fused you could have fused she could have fused we could have fused you could have fused they could have fused	I could have been fusing you could have been fusing she could have been fusing we could have been fusing you could have been fusing they could have been fusing

Negation

Simple form	V-ing form
I could not fuse you could not fuse she could not fuse we could not fuse you could not fuse they could not fuse	I could not be fusing you could not be fusing she could not be fusing we could not be fusing you could not be fusing they could not be fusing
Perfect	V-ing perfect
I could not have fused you could not have fused she could not have fused we could not have fused you could not have fused they could not have fused	I could not have been fusing you could not have been fusing she could not have been fusing we could not have been fusing you could not have been fusing they could not have been fusing

Interrogative form

Simple form	V-ing form
could I fuse? could you fuse? could she fuse? could we fuse? could you fuse? could they fuse?	could I be fusing? could you be fusing? could she be fusing? could we be fusing? could you be fusing? could they be fusing?
Perfect	V-ing perfect
could I have fused? could you have fused? could she have fused? could we have fused? could you have fused? could they have fused?	could I have been fusing? could you have been fusing? could she have been fusing? could we have been fusing? could you have been fusing? could they have been fusing?

Interro-negative form

Simple form	V-ing form
could I not fuse? could you not fuse? could she not fuse? could we not fuse? could you not fuse? could they not fuse?	could I not be fusing? could you not be fusing? could she not be fusing? could we not be fusing? could you not be fusing? could they not be fusing?
Perfect	V-ing perfect
could I not have fused? could you not have fused? could she not have fused? could we not have fused? could you not have fused? could they not have fused?	could I not have been fusing? could you not have been fusing? could she not have been fusing? could we not have been fusing? could you not have been fusing? could they not have been fusing?