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 must not cross-post you must not cross-post he must not cross-post we must not cross-post you must not cross-post they must not cross-post	I must not be cross-posting you must not be cross-posting he must not be cross-posting we must not be cross-posting you must not be cross-posting they must not be cross-posting
Perfect	V-ing perfect
I must not have cross-posted you must not have cross-posted he must not have cross-posted we must not have cross-posted you must not have cross-posted they must not have cross-posted	I must not have been cross-posting you must not have been cross-posting he must not have been cross-posting we must not have been cross-posting you must not have been cross-posting they must not 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
must I not cross-post? must you not cross-post? must he not cross-post? must we not cross-post? must you not cross-post? must they not cross-post?	must I not be cross-posting? must you not be cross-posting? must he not be cross-posting? must we not be cross-posting? must you not be cross-posting? must they not be cross-posting?
Perfect	V-ing perfect
must I not have cross-posted? must you not have cross-posted? must he not have cross-posted? must we not have cross-posted? must you not have cross-posted? must they not have cross-posted?	must I not have been cross-posting? must you not have been cross-posting? must he not have been cross-posting? must we not have been cross-posting? must you not have been cross-posting? must they not have been cross-posting?