could counterquestion
Regular verb: counterquestion - counterquestioned- counterquestioned

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

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

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

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