English verb conjugation
MUST CORKSCREW

Regular verb: corkscrew - corkscrewed - corkscrewed

Affirmation

Simple form	V-ing form
I must corkscrew you must corkscrew he must corkscrew we must corkscrew you must corkscrew they must corkscrew	I must be corkscrewing you must be corkscrewing he must be corkscrewing we must be corkscrewing you must be corkscrewing they must be corkscrewing
Perfect	V-ing perfect
I must have corkscrewed you must have corkscrewed he must have corkscrewed we must have corkscrewed you must have corkscrewed they must have corkscrewed	I must have been corkscrewing you must have been corkscrewing he must have been corkscrewing we must have been corkscrewing you must have been corkscrewing they must have been corkscrewing

Negation

Simple form	V-ing form
I mustn't corkscrew you mustn't corkscrew he mustn't corkscrew we mustn't corkscrew you mustn't corkscrew they mustn't corkscrew	I mustn't be corkscrewing you mustn't be corkscrewing he mustn't be corkscrewing we mustn't be corkscrewing you mustn't be corkscrewing they mustn't be corkscrewing
Perfect	V-ing perfect
I mustn't have corkscrewed you mustn't have corkscrewed he mustn't have corkscrewed we mustn't have corkscrewed you mustn't have corkscrewed they mustn't have corkscrewed	I mustn't have been corkscrewing you mustn't have been corkscrewing he mustn't have been corkscrewing we mustn't have been corkscrewing you mustn't have been corkscrewing they mustn't have been corkscrewing

Interrogative form

Simple form	V-ing form
must I corkscrew? must you corkscrew? must he corkscrew? must we corkscrew? must you corkscrew? must they corkscrew?	must I be corkscrewing? must you be corkscrewing? must he be corkscrewing? must we be corkscrewing? must you be corkscrewing? must they be corkscrewing?
Perfect	V-ing perfect
must I have corkscrewed? must you have corkscrewed? must he have corkscrewed? must we have corkscrewed? must you have corkscrewed? must they have corkscrewed?	must I have been corkscrewing? must you have been corkscrewing? must he have been corkscrewing? must we have been corkscrewing? must you have been corkscrewing? must they have been corkscrewing?

Interro-negative form

Simple form	V-ing form
mustn't I corkscrew? mustn't you corkscrew? mustn't he corkscrew? mustn't we corkscrew? mustn't you corkscrew? mustn't they corkscrew?	mustn't I be corkscrewing? mustn't you be corkscrewing? mustn't he be corkscrewing? mustn't we be corkscrewing? mustn't you be corkscrewing? mustn't they be corkscrewing?
Perfect	V-ing perfect
mustn't I have corkscrewed? mustn't you have corkscrewed? mustn't he have corkscrewed? mustn't we have corkscrewed? mustn't you have corkscrewed? mustn't they have corkscrewed?	mustn't I have been corkscrewing? mustn't you have been corkscrewing? mustn't he have been corkscrewing? mustn't we have been corkscrewing? mustn't you have been corkscrewing? mustn't they have been corkscrewing?