English verb conjugation
MUST STEP

Regular verb: step - stepped - stepped

Affirmation

Simple form	V-ing form
I must step you must step he must step we must step you must step they must step	I must be stepping you must be stepping he must be stepping we must be stepping you must be stepping they must be stepping
Perfect	V-ing perfect
I must have stepped you must have stepped he must have stepped we must have stepped you must have stepped they must have stepped	I must have been stepping you must have been stepping he must have been stepping we must have been stepping you must have been stepping they must have been stepping

Negation

Simple form	V-ing form
I mustn't step you mustn't step he mustn't step we mustn't step you mustn't step they mustn't step	I mustn't be stepping you mustn't be stepping he mustn't be stepping we mustn't be stepping you mustn't be stepping they mustn't be stepping
Perfect	V-ing perfect
I mustn't have stepped you mustn't have stepped he mustn't have stepped we mustn't have stepped you mustn't have stepped they mustn't have stepped	I mustn't have been stepping you mustn't have been stepping he mustn't have been stepping we mustn't have been stepping you mustn't have been stepping they mustn't have been stepping

Interrogative form

Simple form	V-ing form
must I step? must you step? must he step? must we step? must you step? must they step?	must I be stepping? must you be stepping? must he be stepping? must we be stepping? must you be stepping? must they be stepping?
Perfect	V-ing perfect
must I have stepped? must you have stepped? must he have stepped? must we have stepped? must you have stepped? must they have stepped?	must I have been stepping? must you have been stepping? must he have been stepping? must we have been stepping? must you have been stepping? must they have been stepping?

Interro-negative form

Simple form	V-ing form
mustn't I step? mustn't you step? mustn't he step? mustn't we step? mustn't you step? mustn't they step?	mustn't I be stepping? mustn't you be stepping? mustn't he be stepping? mustn't we be stepping? mustn't you be stepping? mustn't they be stepping?
Perfect	V-ing perfect
mustn't I have stepped? mustn't you have stepped? mustn't he have stepped? mustn't we have stepped? mustn't you have stepped? mustn't they have stepped?	mustn't I have been stepping? mustn't you have been stepping? mustn't he have been stepping? mustn't we have been stepping? mustn't you have been stepping? mustn't they have been stepping?