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