English verb conjugation
MUST CREW

Regular verb: crew - crewed - crewed

Affirmation

Simple form	V-ing form
I must crew you must crew he must crew we must crew you must crew they must crew	I must be crewing you must be crewing he must be crewing we must be crewing you must be crewing they must be crewing
Perfect	V-ing perfect
I must have crewed you must have crewed he must have crewed we must have crewed you must have crewed they must have crewed	I must have been crewing you must have been crewing he must have been crewing we must have been crewing you must have been crewing they must have been crewing

Negation

Simple form	V-ing form
I must not crew you must not crew he must not crew we must not crew you must not crew they must not crew	I must not be crewing you must not be crewing he must not be crewing we must not be crewing you must not be crewing they must not be crewing
Perfect	V-ing perfect
I must not have crewed you must not have crewed he must not have crewed we must not have crewed you must not have crewed they must not have crewed	I must not have been crewing you must not have been crewing he must not have been crewing we must not have been crewing you must not have been crewing they must not have been crewing

Interrogative form

Simple form	V-ing form
must I crew? must you crew? must he crew? must we crew? must you crew? must they crew?	must I be crewing? must you be crewing? must he be crewing? must we be crewing? must you be crewing? must they be crewing?
Perfect	V-ing perfect
must I have crewed? must you have crewed? must he have crewed? must we have crewed? must you have crewed? must they have crewed?	must I have been crewing? must you have been crewing? must he have been crewing? must we have been crewing? must you have been crewing? must they have been crewing?

Interro-negative form

Simple form	V-ing form
must I not crew? must you not crew? must he not crew? must we not crew? must you not crew? must they not crew?	must I not be crewing? must you not be crewing? must he not be crewing? must we not be crewing? must you not be crewing? must they not be crewing?
Perfect	V-ing perfect
must I not have crewed? must you not have crewed? must he not have crewed? must we not have crewed? must you not have crewed? must they not have crewed?	must I not have been crewing? must you not have been crewing? must he not have been crewing? must we not have been crewing? must you not have been crewing? must they not have been crewing?