English verb conjugation
MUST INTERFUSE

Regular verb: interfuse - interfused - interfused

Affirmation

Simple form	V-ing form
I must interfuse you must interfuse he must interfuse we must interfuse you must interfuse they must interfuse	I must be interfusing you must be interfusing he must be interfusing we must be interfusing you must be interfusing they must be interfusing
Perfect	V-ing perfect
I must have interfused you must have interfused he must have interfused we must have interfused you must have interfused they must have interfused	I must have been interfusing you must have been interfusing he must have been interfusing we must have been interfusing you must have been interfusing they must have been interfusing

Negation

Simple form	V-ing form
I mustn't interfuse you mustn't interfuse he mustn't interfuse we mustn't interfuse you mustn't interfuse they mustn't interfuse	I mustn't be interfusing you mustn't be interfusing he mustn't be interfusing we mustn't be interfusing you mustn't be interfusing they mustn't be interfusing
Perfect	V-ing perfect
I mustn't have interfused you mustn't have interfused he mustn't have interfused we mustn't have interfused you mustn't have interfused they mustn't have interfused	I mustn't have been interfusing you mustn't have been interfusing he mustn't have been interfusing we mustn't have been interfusing you mustn't have been interfusing they mustn't have been interfusing

Interrogative form

Simple form	V-ing form
must I interfuse? must you interfuse? must he interfuse? must we interfuse? must you interfuse? must they interfuse?	must I be interfusing? must you be interfusing? must he be interfusing? must we be interfusing? must you be interfusing? must they be interfusing?
Perfect	V-ing perfect
must I have interfused? must you have interfused? must he have interfused? must we have interfused? must you have interfused? must they have interfused?	must I have been interfusing? must you have been interfusing? must he have been interfusing? must we have been interfusing? must you have been interfusing? must they have been interfusing?

Interro-negative form

Simple form	V-ing form
mustn't I interfuse? mustn't you interfuse? mustn't he interfuse? mustn't we interfuse? mustn't you interfuse? mustn't they interfuse?	mustn't I be interfusing? mustn't you be interfusing? mustn't he be interfusing? mustn't we be interfusing? mustn't you be interfusing? mustn't they be interfusing?
Perfect	V-ing perfect
mustn't I have interfused? mustn't you have interfused? mustn't he have interfused? mustn't we have interfused? mustn't you have interfused? mustn't they have interfused?	mustn't I have been interfusing? mustn't you have been interfusing? mustn't he have been interfusing? mustn't we have been interfusing? mustn't you have been interfusing? mustn't they have been interfusing?