English verb conjugation
MUST PERFUSE

Regular verb: perfuse - perfused - perfused

Affirmation

Simple form	V-ing form
I must perfuse you must perfuse he must perfuse we must perfuse you must perfuse they must perfuse	I must be perfusing you must be perfusing he must be perfusing we must be perfusing you must be perfusing they must be perfusing
Perfect	V-ing perfect
I must have perfused you must have perfused he must have perfused we must have perfused you must have perfused they must have perfused	I must have been perfusing you must have been perfusing he must have been perfusing we must have been perfusing you must have been perfusing they must have been perfusing

Negation

Simple form	V-ing form
I must not perfuse you must not perfuse he must not perfuse we must not perfuse you must not perfuse they must not perfuse	I must not be perfusing you must not be perfusing he must not be perfusing we must not be perfusing you must not be perfusing they must not be perfusing
Perfect	V-ing perfect
I must not have perfused you must not have perfused he must not have perfused we must not have perfused you must not have perfused they must not have perfused	I must not have been perfusing you must not have been perfusing he must not have been perfusing we must not have been perfusing you must not have been perfusing they must not have been perfusing

Interrogative form

Simple form	V-ing form
must I perfuse? must you perfuse? must he perfuse? must we perfuse? must you perfuse? must they perfuse?	must I be perfusing? must you be perfusing? must he be perfusing? must we be perfusing? must you be perfusing? must they be perfusing?
Perfect	V-ing perfect
must I have perfused? must you have perfused? must he have perfused? must we have perfused? must you have perfused? must they have perfused?	must I have been perfusing? must you have been perfusing? must he have been perfusing? must we have been perfusing? must you have been perfusing? must they have been perfusing?

Interro-negative form

Simple form	V-ing form
must I not perfuse? must you not perfuse? must he not perfuse? must we not perfuse? must you not perfuse? must they not perfuse?	must I not be perfusing? must you not be perfusing? must he not be perfusing? must we not be perfusing? must you not be perfusing? must they not be perfusing?
Perfect	V-ing perfect
must I not have perfused? must you not have perfused? must he not have perfused? must we not have perfused? must you not have perfused? must they not have perfused?	must I not have been perfusing? must you not have been perfusing? must he not have been perfusing? must we not have been perfusing? must you not have been perfusing? must they not have been perfusing?