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 mustn't perfuse you mustn't perfuse he mustn't perfuse we mustn't perfuse you mustn't perfuse they mustn't perfuse	I mustn't be perfusing you mustn't be perfusing he mustn't be perfusing we mustn't be perfusing you mustn't be perfusing they mustn't be perfusing
Perfect	V-ing perfect
I mustn't have perfused you mustn't have perfused he mustn't have perfused we mustn't have perfused you mustn't have perfused they mustn't have perfused	I mustn't have been perfusing you mustn't have been perfusing he mustn't have been perfusing we mustn't have been perfusing you mustn't have been perfusing they mustn't 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
mustn't I perfuse? mustn't you perfuse? mustn't he perfuse? mustn't we perfuse? mustn't you perfuse? mustn't they perfuse?	mustn't I be perfusing? mustn't you be perfusing? mustn't he be perfusing? mustn't we be perfusing? mustn't you be perfusing? mustn't they be perfusing?
Perfect	V-ing perfect
mustn't I have perfused? mustn't you have perfused? mustn't he have perfused? mustn't we have perfused? mustn't you have perfused? mustn't they have perfused?	mustn't I have been perfusing? mustn't you have been perfusing? mustn't he have been perfusing? mustn't we have been perfusing? mustn't you have been perfusing? mustn't they have been perfusing?