English verb conjugation
MUST CROSS-POST

Regular verb: cross-post - cross-posted - cross-posted

Affirmation

Simple form	V-ing form
I must cross-post you must cross-post he must cross-post we must cross-post you must cross-post they must cross-post	I must be cross-posting you must be cross-posting he must be cross-posting we must be cross-posting you must be cross-posting they must be cross-posting
Perfect	V-ing perfect
I must have cross-posted you must have cross-posted he must have cross-posted we must have cross-posted you must have cross-posted they must have cross-posted	I must have been cross-posting you must have been cross-posting he must have been cross-posting we must have been cross-posting you must have been cross-posting they must have been cross-posting

Negation

Simple form	V-ing form
I mustn't cross-post you mustn't cross-post he mustn't cross-post we mustn't cross-post you mustn't cross-post they mustn't cross-post	I mustn't be cross-posting you mustn't be cross-posting he mustn't be cross-posting we mustn't be cross-posting you mustn't be cross-posting they mustn't be cross-posting
Perfect	V-ing perfect
I mustn't have cross-posted you mustn't have cross-posted he mustn't have cross-posted we mustn't have cross-posted you mustn't have cross-posted they mustn't have cross-posted	I mustn't have been cross-posting you mustn't have been cross-posting he mustn't have been cross-posting we mustn't have been cross-posting you mustn't have been cross-posting they mustn't have been cross-posting

Interrogative form

Simple form	V-ing form
must I cross-post? must you cross-post? must he cross-post? must we cross-post? must you cross-post? must they cross-post?	must I be cross-posting? must you be cross-posting? must he be cross-posting? must we be cross-posting? must you be cross-posting? must they be cross-posting?
Perfect	V-ing perfect
must I have cross-posted? must you have cross-posted? must he have cross-posted? must we have cross-posted? must you have cross-posted? must they have cross-posted?	must I have been cross-posting? must you have been cross-posting? must he have been cross-posting? must we have been cross-posting? must you have been cross-posting? must they have been cross-posting?

Interro-negative form

Simple form	V-ing form
mustn't I cross-post? mustn't you cross-post? mustn't he cross-post? mustn't we cross-post? mustn't you cross-post? mustn't they cross-post?	mustn't I be cross-posting? mustn't you be cross-posting? mustn't he be cross-posting? mustn't we be cross-posting? mustn't you be cross-posting? mustn't they be cross-posting?
Perfect	V-ing perfect
mustn't I have cross-posted? mustn't you have cross-posted? mustn't he have cross-posted? mustn't we have cross-posted? mustn't you have cross-posted? mustn't they have cross-posted?	mustn't I have been cross-posting? mustn't you have been cross-posting? mustn't he have been cross-posting? mustn't we have been cross-posting? mustn't you have been cross-posting? mustn't they have been cross-posting?