English verb conjugation
MUST CORKSCREW

Regular verb: corkscrew - corkscrewed - corkscrewed

Affirmation

Simple form	V-ing form
I must corkscrew you must corkscrew she must corkscrew we must corkscrew you must corkscrew they must corkscrew	I must be corkscrewing you must be corkscrewing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she corkscrew? must we corkscrew? must you corkscrew? must they corkscrew?	must I be corkscrewing? must you be corkscrewing? must she 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 she 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 she 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 she 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 she 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 she 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 she have been corkscrewing? mustn't we have been corkscrewing? mustn't you have been corkscrewing? mustn't they have been corkscrewing?