English verb conjugation
MUST INVIGILATE

Regular verb: invigilate - invigilated - invigilated

Affirmation

Simple form	V-ing form
I must invigilate you must invigilate he must invigilate we must invigilate you must invigilate they must invigilate	I must be invigilating you must be invigilating he must be invigilating we must be invigilating you must be invigilating they must be invigilating
Perfect	V-ing perfect
I must have invigilated you must have invigilated he must have invigilated we must have invigilated you must have invigilated they must have invigilated	I must have been invigilating you must have been invigilating he must have been invigilating we must have been invigilating you must have been invigilating they must have been invigilating

Negation

Simple form	V-ing form
I must not invigilate you must not invigilate he must not invigilate we must not invigilate you must not invigilate they must not invigilate	I must not be invigilating you must not be invigilating he must not be invigilating we must not be invigilating you must not be invigilating they must not be invigilating
Perfect	V-ing perfect
I must not have invigilated you must not have invigilated he must not have invigilated we must not have invigilated you must not have invigilated they must not have invigilated	I must not have been invigilating you must not have been invigilating he must not have been invigilating we must not have been invigilating you must not have been invigilating they must not have been invigilating

Interrogative form

Simple form	V-ing form
must I invigilate? must you invigilate? must he invigilate? must we invigilate? must you invigilate? must they invigilate?	must I be invigilating? must you be invigilating? must he be invigilating? must we be invigilating? must you be invigilating? must they be invigilating?
Perfect	V-ing perfect
must I have invigilated? must you have invigilated? must he have invigilated? must we have invigilated? must you have invigilated? must they have invigilated?	must I have been invigilating? must you have been invigilating? must he have been invigilating? must we have been invigilating? must you have been invigilating? must they have been invigilating?

Interro-negative form

Simple form	V-ing form
must I not invigilate? must you not invigilate? must he not invigilate? must we not invigilate? must you not invigilate? must they not invigilate?	must I not be invigilating? must you not be invigilating? must he not be invigilating? must we not be invigilating? must you not be invigilating? must they not be invigilating?
Perfect	V-ing perfect
must I not have invigilated? must you not have invigilated? must he not have invigilated? must we not have invigilated? must you not have invigilated? must they not have invigilated?	must I not have been invigilating? must you not have been invigilating? must he not have been invigilating? must we not have been invigilating? must you not have been invigilating? must they not have been invigilating?