could counter
Regular verb: counter - countered- countered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could counter
you could counter
she could counter
we could counter
you could counter
they could counter 	I could be countering
you could be countering
she could be countering
we could be countering
you could be countering
they could be countering	I could have countered
you could have countered
she could have countered
we could have countered
you could have countered
they could have countered	I could have been countering
you could have been countering
she could have been countering
we could have been countering
you could have been countering
they could have been countering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't counter
you couldn't counter
she couldn't counter
we couldn't counter
you couldn't counter
they couldn't counter 	I couldn't be countering
you couldn't be countering
she couldn't be countering
we couldn't be countering
you couldn't be countering
they couldn't be countering	I couldn't have countered
you couldn't have countered
she couldn't have countered
we couldn't have countered
you couldn't have countered
they couldn't have countered	I couldn't have been countering
you couldn't have been countering
she couldn't have been countering
we couldn't have been countering
you couldn't have been countering
they couldn't have been countering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I counter?
could you counter?
could she counter?
could we counter?
could you counter?
could they counter? 	could I be countering?
could you be countering?
could she be countering?
could we be countering?
could you be countering?
could they be countering? 	could I have countered?
could you have countered?
could she have countered?
could we have countered?
could you have countered?
could they have countered? 	could I have been countering?
could you have been countering?
could she have been countering?
could we have been countering?
could you have been countering?
could they have been countering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I counter?
couldn't you counter?
couldn't she counter?
couldn't we counter?
couldn't you counter?
couldn't they counter? 	couldn't I be countering?
couldn't you be countering?
couldn't she be countering?
couldn't we be countering?
couldn't you be countering?
couldn't they be countering? 	couldn't I have countered?
couldn't you have countered?
couldn't she have countered?
couldn't we have countered?
couldn't you have countered?
couldn't they have countered? 	couldn't I have been countering?
couldn't you have been countering?
couldn't she have been countering?
couldn't we have been countering?
couldn't you have been countering?
couldn't they have been countering?