English verb conjugation
COULD PAIR

Regular verb: pair - paired - paired

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?