English verb conjugation
MUST COUNTERQUESTION

Regular verb: counterquestion - counterquestioned - counterquestioned

Affirmation

Simple form	V-ing form
I must counterquestion you must counterquestion he must counterquestion we must counterquestion you must counterquestion they must counterquestion	I must be counterquestioning you must be counterquestioning he must be counterquestioning we must be counterquestioning you must be counterquestioning they must be counterquestioning
Perfect	V-ing perfect
I must have counterquestioned you must have counterquestioned he must have counterquestioned we must have counterquestioned you must have counterquestioned they must have counterquestioned	I must have been counterquestioning you must have been counterquestioning he must have been counterquestioning we must have been counterquestioning you must have been counterquestioning they must have been counterquestioning

Negation

Simple form	V-ing form
I must not counterquestion you must not counterquestion he must not counterquestion we must not counterquestion you must not counterquestion they must not counterquestion	I must not be counterquestioning you must not be counterquestioning he must not be counterquestioning we must not be counterquestioning you must not be counterquestioning they must not be counterquestioning
Perfect	V-ing perfect
I must not have counterquestioned you must not have counterquestioned he must not have counterquestioned we must not have counterquestioned you must not have counterquestioned they must not have counterquestioned	I must not have been counterquestioning you must not have been counterquestioning he must not have been counterquestioning we must not have been counterquestioning you must not have been counterquestioning they must not have been counterquestioning

Interrogative form

Simple form	V-ing form
must I counterquestion? must you counterquestion? must he counterquestion? must we counterquestion? must you counterquestion? must they counterquestion?	must I be counterquestioning? must you be counterquestioning? must he be counterquestioning? must we be counterquestioning? must you be counterquestioning? must they be counterquestioning?
Perfect	V-ing perfect
must I have counterquestioned? must you have counterquestioned? must he have counterquestioned? must we have counterquestioned? must you have counterquestioned? must they have counterquestioned?	must I have been counterquestioning? must you have been counterquestioning? must he have been counterquestioning? must we have been counterquestioning? must you have been counterquestioning? must they have been counterquestioning?

Interro-negative form

Simple form	V-ing form
must I not counterquestion? must you not counterquestion? must he not counterquestion? must we not counterquestion? must you not counterquestion? must they not counterquestion?	must I not be counterquestioning? must you not be counterquestioning? must he not be counterquestioning? must we not be counterquestioning? must you not be counterquestioning? must they not be counterquestioning?
Perfect	V-ing perfect
must I not have counterquestioned? must you not have counterquestioned? must he not have counterquestioned? must we not have counterquestioned? must you not have counterquestioned? must they not have counterquestioned?	must I not have been counterquestioning? must you not have been counterquestioning? must he not have been counterquestioning? must we not have been counterquestioning? must you not have been counterquestioning? must they not have been counterquestioning?