must counterquestion
Regular verb: counterquestion - counterquestioned- counterquestioned

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