English verb conjugation
MUST INTERFUSE

Regular verb: interfuse - interfused - interfused

Affirmation

Simple form	V-ing form
I must interfuse you must interfuse she must interfuse we must interfuse you must interfuse they must interfuse	I must be interfusing you must be interfusing she 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 she 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 she 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 must not interfuse you must not interfuse she must not interfuse we must not interfuse you must not interfuse they must not interfuse	I must not be interfusing you must not be interfusing she must not be interfusing we must not be interfusing you must not be interfusing they must not be interfusing
Perfect	V-ing perfect
I must not have interfused you must not have interfused she must not have interfused we must not have interfused you must not have interfused they must not have interfused	I must not have been interfusing you must not have been interfusing she must not have been interfusing we must not have been interfusing you must not have been interfusing they must not have been interfusing

Interrogative form

Simple form	V-ing form
must I interfuse? must you interfuse? must she interfuse? must we interfuse? must you interfuse? must they interfuse?	must I be interfusing? must you be interfusing? must she 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 she 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 she 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
must I not interfuse? must you not interfuse? must she not interfuse? must we not interfuse? must you not interfuse? must they not interfuse?	must I not be interfusing? must you not be interfusing? must she not be interfusing? must we not be interfusing? must you not be interfusing? must they not be interfusing?
Perfect	V-ing perfect
must I not have interfused? must you not have interfused? must she not have interfused? must we not have interfused? must you not have interfused? must they not have interfused?	must I not have been interfusing? must you not have been interfusing? must she not have been interfusing? must we not have been interfusing? must you not have been interfusing? must they not have been interfusing?