I must rotate you must rotate he must rotate we must rotate you must rotate they must rotate
V-ing form
I must be rotating you must be rotating he must be rotating we must be rotating you must be rotating they must be rotating
Perfect
I must have rotated you must have rotated he must have rotated we must have rotated you must have rotated they must have rotated
V-ing perfect
I must have been rotating you must have been rotating he must have been rotating we must have been rotating you must have been rotating they must have been rotating
Negation
Simple form
I mustn't rotate you mustn't rotate he mustn't rotate we mustn't rotate you mustn't rotate they mustn't rotate
V-ing form
I mustn't be rotating you mustn't be rotating he mustn't be rotating we mustn't be rotating you mustn't be rotating they mustn't be rotating
Perfect
I mustn't have rotated you mustn't have rotated he mustn't have rotated we mustn't have rotated you mustn't have rotated they mustn't have rotated
V-ing perfect
I mustn't have been rotating you mustn't have been rotating he mustn't have been rotating we mustn't have been rotating you mustn't have been rotating they mustn't have been rotating
Interrogative form
Simple form
must I rotate? must you rotate? must he rotate? must we rotate? must you rotate? must they rotate?
V-ing form
must I be rotating? must you be rotating? must he be rotating? must we be rotating? must you be rotating? must they be rotating?
Perfect
must I have rotated? must you have rotated? must he have rotated? must we have rotated? must you have rotated? must they have rotated?
V-ing perfect
must I have been rotating? must you have been rotating? must he have been rotating? must we have been rotating? must you have been rotating? must they have been rotating?
Interro-negative form
Simple form
mustn't I rotate? mustn't you rotate? mustn't he rotate? mustn't we rotate? mustn't you rotate? mustn't they rotate?
V-ing form
mustn't I be rotating? mustn't you be rotating? mustn't he be rotating? mustn't we be rotating? mustn't you be rotating? mustn't they be rotating?
Perfect
mustn't I have rotated? mustn't you have rotated? mustn't he have rotated? mustn't we have rotated? mustn't you have rotated? mustn't they have rotated?
V-ing perfect
mustn't I have been rotating? mustn't you have been rotating? mustn't he have been rotating? mustn't we have been rotating? mustn't you have been rotating? mustn't they have been rotating?