I must cross-section you must cross-section he must cross-section we must cross-section you must cross-section they must cross-section
V-ing form
I must be cross-sectioning you must be cross-sectioning he must be cross-sectioning we must be cross-sectioning you must be cross-sectioning they must be cross-sectioning
Perfect
I must have cross-sectioned you must have cross-sectioned he must have cross-sectioned we must have cross-sectioned you must have cross-sectioned they must have cross-sectioned
V-ing perfect
I must have been cross-sectioning you must have been cross-sectioning he must have been cross-sectioning we must have been cross-sectioning you must have been cross-sectioning they must have been cross-sectioning
Negation
Simple form
I mustn't cross-section you mustn't cross-section he mustn't cross-section we mustn't cross-section you mustn't cross-section they mustn't cross-section
V-ing form
I mustn't be cross-sectioning you mustn't be cross-sectioning he mustn't be cross-sectioning we mustn't be cross-sectioning you mustn't be cross-sectioning they mustn't be cross-sectioning
Perfect
I mustn't have cross-sectioned you mustn't have cross-sectioned he mustn't have cross-sectioned we mustn't have cross-sectioned you mustn't have cross-sectioned they mustn't have cross-sectioned
V-ing perfect
I mustn't have been cross-sectioning you mustn't have been cross-sectioning he mustn't have been cross-sectioning we mustn't have been cross-sectioning you mustn't have been cross-sectioning they mustn't have been cross-sectioning
Interrogative form
Simple form
must I cross-section? must you cross-section? must he cross-section? must we cross-section? must you cross-section? must they cross-section?
V-ing form
must I be cross-sectioning? must you be cross-sectioning? must he be cross-sectioning? must we be cross-sectioning? must you be cross-sectioning? must they be cross-sectioning?
Perfect
must I have cross-sectioned? must you have cross-sectioned? must he have cross-sectioned? must we have cross-sectioned? must you have cross-sectioned? must they have cross-sectioned?
V-ing perfect
must I have been cross-sectioning? must you have been cross-sectioning? must he have been cross-sectioning? must we have been cross-sectioning? must you have been cross-sectioning? must they have been cross-sectioning?
Interro-negative form
Simple form
mustn't I cross-section? mustn't you cross-section? mustn't he cross-section? mustn't we cross-section? mustn't you cross-section? mustn't they cross-section?
V-ing form
mustn't I be cross-sectioning? mustn't you be cross-sectioning? mustn't he be cross-sectioning? mustn't we be cross-sectioning? mustn't you be cross-sectioning? mustn't they be cross-sectioning?
Perfect
mustn't I have cross-sectioned? mustn't you have cross-sectioned? mustn't he have cross-sectioned? mustn't we have cross-sectioned? mustn't you have cross-sectioned? mustn't they have cross-sectioned?
V-ing perfect
mustn't I have been cross-sectioning? mustn't you have been cross-sectioning? mustn't he have been cross-sectioning? mustn't we have been cross-sectioning? mustn't you have been cross-sectioning? mustn't they have been cross-sectioning?