English verb conjugation
MUST DEFER

Regular verb: defer - deferred - deferred

Affirmation

Simple form	V-ing form
I must defer you must defer she must defer we must defer you must defer they must defer	I must be deferring you must be deferring she must be deferring we must be deferring you must be deferring they must be deferring
Perfect	V-ing perfect
I must have deferred you must have deferred she must have deferred we must have deferred you must have deferred they must have deferred	I must have been deferring you must have been deferring she must have been deferring we must have been deferring you must have been deferring they must have been deferring

Negation

Simple form	V-ing form
I mustn't defer you mustn't defer she mustn't defer we mustn't defer you mustn't defer they mustn't defer	I mustn't be deferring you mustn't be deferring she mustn't be deferring we mustn't be deferring you mustn't be deferring they mustn't be deferring
Perfect	V-ing perfect
I mustn't have deferred you mustn't have deferred she mustn't have deferred we mustn't have deferred you mustn't have deferred they mustn't have deferred	I mustn't have been deferring you mustn't have been deferring she mustn't have been deferring we mustn't have been deferring you mustn't have been deferring they mustn't have been deferring

Interrogative form

Simple form	V-ing form
must I defer? must you defer? must she defer? must we defer? must you defer? must they defer?	must I be deferring? must you be deferring? must she be deferring? must we be deferring? must you be deferring? must they be deferring?
Perfect	V-ing perfect
must I have deferred? must you have deferred? must she have deferred? must we have deferred? must you have deferred? must they have deferred?	must I have been deferring? must you have been deferring? must she have been deferring? must we have been deferring? must you have been deferring? must they have been deferring?

Interro-negative form

Simple form	V-ing form
mustn't I defer? mustn't you defer? mustn't she defer? mustn't we defer? mustn't you defer? mustn't they defer?	mustn't I be deferring? mustn't you be deferring? mustn't she be deferring? mustn't we be deferring? mustn't you be deferring? mustn't they be deferring?
Perfect	V-ing perfect
mustn't I have deferred? mustn't you have deferred? mustn't she have deferred? mustn't we have deferred? mustn't you have deferred? mustn't they have deferred?	mustn't I have been deferring? mustn't you have been deferring? mustn't she have been deferring? mustn't we have been deferring? mustn't you have been deferring? mustn't they have been deferring?