English verb conjugation
MUST FUSE

Regular verb: fuse - fused - fused

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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