could pair
Regular verb: pair - paired- paired

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could pair
you could pair
she could pair
we could pair
you could pair
they could pair 	I could be pairing
you could be pairing
she could be pairing
we could be pairing
you could be pairing
they could be pairing	I could have paired
you could have paired
she could have paired
we could have paired
you could have paired
they could have paired	I could have been pairing
you could have been pairing
she could have been pairing
we could have been pairing
you could have been pairing
they could have been pairing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't pair
you couldn't pair
she couldn't pair
we couldn't pair
you couldn't pair
they couldn't pair 	I couldn't be pairing
you couldn't be pairing
she couldn't be pairing
we couldn't be pairing
you couldn't be pairing
they couldn't be pairing	I couldn't have paired
you couldn't have paired
she couldn't have paired
we couldn't have paired
you couldn't have paired
they couldn't have paired	I couldn't have been pairing
you couldn't have been pairing
she couldn't have been pairing
we couldn't have been pairing
you couldn't have been pairing
they couldn't have been pairing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I pair?
could you pair?
could she pair?
could we pair?
could you pair?
could they pair? 	could I be pairing?
could you be pairing?
could she be pairing?
could we be pairing?
could you be pairing?
could they be pairing? 	could I have paired?
could you have paired?
could she have paired?
could we have paired?
could you have paired?
could they have paired? 	could I have been pairing?
could you have been pairing?
could she have been pairing?
could we have been pairing?
could you have been pairing?
could they have been pairing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I pair?
couldn't you pair?
couldn't she pair?
couldn't we pair?
couldn't you pair?
couldn't they pair? 	couldn't I be pairing?
couldn't you be pairing?
couldn't she be pairing?
couldn't we be pairing?
couldn't you be pairing?
couldn't they be pairing? 	couldn't I have paired?
couldn't you have paired?
couldn't she have paired?
couldn't we have paired?
couldn't you have paired?
couldn't they have paired? 	couldn't I have been pairing?
couldn't you have been pairing?
couldn't she have been pairing?
couldn't we have been pairing?
couldn't you have been pairing?
couldn't they have been pairing?