I must defer you must defer she must defer we must defer you must defer they must defer
V-ing form
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
I must have deferred you must have deferred she must have deferred we must have deferred you must have deferred they must have deferred
V-ing perfect
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
I must not defer you must not defer she must not defer we must not defer you must not defer they must not defer
V-ing form
I must not be deferring you must not be deferring she must not be deferring we must not be deferring you must not be deferring they must not be deferring
Perfect
I must not have deferred you must not have deferred she must not have deferred we must not have deferred you must not have deferred they must not have deferred
V-ing perfect
I must not have been deferring you must not have been deferring she must not have been deferring we must not have been deferring you must not have been deferring they must not have been deferring
Interrogative form
Simple form
must I defer? must you defer? must she defer? must we defer? must you defer? must they defer?
V-ing form
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
must I have deferred? must you have deferred? must she have deferred? must we have deferred? must you have deferred? must they have deferred?
V-ing perfect
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
must I not defer? must you not defer? must she not defer? must we not defer? must you not defer? must they not defer?
V-ing form
must I not be deferring? must you not be deferring? must she not be deferring? must we not be deferring? must you not be deferring? must they not be deferring?
Perfect
must I not have deferred? must you not have deferred? must she not have deferred? must we not have deferred? must you not have deferred? must they not have deferred?
V-ing perfect
must I not have been deferring? must you not have been deferring? must she not have been deferring? must we not have been deferring? must you not have been deferring? must they not have been deferring?