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 mustn't crew you mustn't crew he mustn't crew we mustn't crew you mustn't crew they mustn't crew	I mustn't be crewing you mustn't be crewing he mustn't be crewing we mustn't be crewing you mustn't be crewing they mustn't be crewing
Perfect	V-ing perfect
I mustn't have crewed you mustn't have crewed he mustn't have crewed we mustn't have crewed you mustn't have crewed they mustn't have crewed	I mustn't have been crewing you mustn't have been crewing he mustn't have been crewing we mustn't have been crewing you mustn't have been crewing they mustn't 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
mustn't I crew? mustn't you crew? mustn't he crew? mustn't we crew? mustn't you crew? mustn't they crew?	mustn't I be crewing? mustn't you be crewing? mustn't he be crewing? mustn't we be crewing? mustn't you be crewing? mustn't they be crewing?
Perfect	V-ing perfect
mustn't I have crewed? mustn't you have crewed? mustn't he have crewed? mustn't we have crewed? mustn't you have crewed? mustn't they have crewed?	mustn't I have been crewing? mustn't you have been crewing? mustn't he have been crewing? mustn't we have been crewing? mustn't you have been crewing? mustn't they have been crewing?