I must reverse you must reverse she must reverse we must reverse you must reverse they must reverse
V-ing form
I must be reversing you must be reversing she must be reversing we must be reversing you must be reversing they must be reversing
Perfect
I must have reversed you must have reversed she must have reversed we must have reversed you must have reversed they must have reversed
V-ing perfect
I must have been reversing you must have been reversing she must have been reversing we must have been reversing you must have been reversing they must have been reversing
Negation
Simple form
I mustn't reverse you mustn't reverse she mustn't reverse we mustn't reverse you mustn't reverse they mustn't reverse
V-ing form
I mustn't be reversing you mustn't be reversing she mustn't be reversing we mustn't be reversing you mustn't be reversing they mustn't be reversing
Perfect
I mustn't have reversed you mustn't have reversed she mustn't have reversed we mustn't have reversed you mustn't have reversed they mustn't have reversed
V-ing perfect
I mustn't have been reversing you mustn't have been reversing she mustn't have been reversing we mustn't have been reversing you mustn't have been reversing they mustn't have been reversing
Interrogative form
Simple form
must I reverse? must you reverse? must she reverse? must we reverse? must you reverse? must they reverse?
V-ing form
must I be reversing? must you be reversing? must she be reversing? must we be reversing? must you be reversing? must they be reversing?
Perfect
must I have reversed? must you have reversed? must she have reversed? must we have reversed? must you have reversed? must they have reversed?
V-ing perfect
must I have been reversing? must you have been reversing? must she have been reversing? must we have been reversing? must you have been reversing? must they have been reversing?
Interro-negative form
Simple form
mustn't I reverse? mustn't you reverse? mustn't she reverse? mustn't we reverse? mustn't you reverse? mustn't they reverse?
V-ing form
mustn't I be reversing? mustn't you be reversing? mustn't she be reversing? mustn't we be reversing? mustn't you be reversing? mustn't they be reversing?
Perfect
mustn't I have reversed? mustn't you have reversed? mustn't she have reversed? mustn't we have reversed? mustn't you have reversed? mustn't they have reversed?
V-ing perfect
mustn't I have been reversing? mustn't you have been reversing? mustn't she have been reversing? mustn't we have been reversing? mustn't you have been reversing? mustn't they have been reversing?