could pair
Regular verb: pair - paired- paired

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could pair
you could pair
he could pair
we could pair
you could pair
they could pair 	I could be pairing
you could be pairing
he could be pairing
we could be pairing
you could be pairing
they could be pairing	I could have paired
you could have paired
he 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
he 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
he 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
he 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
he 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
he 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 he pair?
could we pair?
could you pair?
could they pair? 	could I be pairing?
could you be pairing?
could he be pairing?
could we be pairing?
could you be pairing?
could they be pairing? 	could I have paired?
could you have paired?
could he 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 he 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 he 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 he 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 he 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 he have been pairing?
couldn't we have been pairing?
couldn't you have been pairing?
couldn't they have been pairing?