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 couldn't fuse you couldn't fuse she couldn't fuse we couldn't fuse you couldn't fuse they couldn't fuse	I couldn't be fusing you couldn't be fusing she couldn't be fusing we couldn't be fusing you couldn't be fusing they couldn't be fusing
Perfect	V-ing perfect
I couldn't have fused you couldn't have fused she couldn't have fused we couldn't have fused you couldn't have fused they couldn't have fused	I couldn't have been fusing you couldn't have been fusing she couldn't have been fusing we couldn't have been fusing you couldn't have been fusing they couldn't 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
couldn't I fuse? couldn't you fuse? couldn't she fuse? couldn't we fuse? couldn't you fuse? couldn't they fuse?	couldn't I be fusing? couldn't you be fusing? couldn't she be fusing? couldn't we be fusing? couldn't you be fusing? couldn't they be fusing?
Perfect	V-ing perfect
couldn't I have fused? couldn't you have fused? couldn't she have fused? couldn't we have fused? couldn't you have fused? couldn't they have fused?	couldn't I have been fusing? couldn't you have been fusing? couldn't she have been fusing? couldn't we have been fusing? couldn't you have been fusing? couldn't they have been fusing?