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