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 couldn't counterquestion
you couldn't counterquestion
he couldn't counterquestion
we couldn't counterquestion
you couldn't counterquestion
they couldn't counterquestion 	I couldn't be counterquestioning
you couldn't be counterquestioning
he couldn't be counterquestioning
we couldn't be counterquestioning
you couldn't be counterquestioning
they couldn't be counterquestioning	I couldn't have counterquestioned
you couldn't have counterquestioned
he couldn't have counterquestioned
we couldn't have counterquestioned
you couldn't have counterquestioned
they couldn't have counterquestioned	I couldn't have been counterquestioning
you couldn't have been counterquestioning
he couldn't have been counterquestioning
we couldn't have been counterquestioning
you couldn't have been counterquestioning
they couldn't 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 	
couldn't I counterquestion?
couldn't you counterquestion?
couldn't he counterquestion?
couldn't we counterquestion?
couldn't you counterquestion?
couldn't they counterquestion? 	couldn't I be counterquestioning?
couldn't you be counterquestioning?
couldn't he be counterquestioning?
couldn't we be counterquestioning?
couldn't you be counterquestioning?
couldn't they be counterquestioning? 	couldn't I have counterquestioned?
couldn't you have counterquestioned?
couldn't he have counterquestioned?
couldn't we have counterquestioned?
couldn't you have counterquestioned?
couldn't they have counterquestioned? 	couldn't I have been counterquestioning?
couldn't you have been counterquestioning?
couldn't he have been counterquestioning?
couldn't we have been counterquestioning?
couldn't you have been counterquestioning?
couldn't they have been counterquestioning?