English verb conjugation
MUST CRIPPLE

Regular verb: cripple - crippled - crippled

Affirmation

Simple form	V-ing form
I must cripple you must cripple he must cripple we must cripple you must cripple they must cripple	I must be crippling you must be crippling he must be crippling we must be crippling you must be crippling they must be crippling
Perfect	V-ing perfect
I must have crippled you must have crippled he must have crippled we must have crippled you must have crippled they must have crippled	I must have been crippling you must have been crippling he must have been crippling we must have been crippling you must have been crippling they must have been crippling

Negation

Simple form	V-ing form
I mustn't cripple you mustn't cripple he mustn't cripple we mustn't cripple you mustn't cripple they mustn't cripple	I mustn't be crippling you mustn't be crippling he mustn't be crippling we mustn't be crippling you mustn't be crippling they mustn't be crippling
Perfect	V-ing perfect
I mustn't have crippled you mustn't have crippled he mustn't have crippled we mustn't have crippled you mustn't have crippled they mustn't have crippled	I mustn't have been crippling you mustn't have been crippling he mustn't have been crippling we mustn't have been crippling you mustn't have been crippling they mustn't have been crippling

Interrogative form

Simple form	V-ing form
must I cripple? must you cripple? must he cripple? must we cripple? must you cripple? must they cripple?	must I be crippling? must you be crippling? must he be crippling? must we be crippling? must you be crippling? must they be crippling?
Perfect	V-ing perfect
must I have crippled? must you have crippled? must he have crippled? must we have crippled? must you have crippled? must they have crippled?	must I have been crippling? must you have been crippling? must he have been crippling? must we have been crippling? must you have been crippling? must they have been crippling?

Interro-negative form

Simple form	V-ing form
mustn't I cripple? mustn't you cripple? mustn't he cripple? mustn't we cripple? mustn't you cripple? mustn't they cripple?	mustn't I be crippling? mustn't you be crippling? mustn't he be crippling? mustn't we be crippling? mustn't you be crippling? mustn't they be crippling?
Perfect	V-ing perfect
mustn't I have crippled? mustn't you have crippled? mustn't he have crippled? mustn't we have crippled? mustn't you have crippled? mustn't they have crippled?	mustn't I have been crippling? mustn't you have been crippling? mustn't he have been crippling? mustn't we have been crippling? mustn't you have been crippling? mustn't they have been crippling?