I can pair you can pair she can pair we can pair you can pair they can pair
V-ing form
I can be pairing you can be pairing she can be pairing we can be pairing you can be pairing they can be pairing
Perfect
I can have paired you can have paired she can have paired we can have paired you can have paired they can have paired
V-ing perfect
I can have been pairing you can have been pairing she can have been pairing we can have been pairing you can have been pairing they can have been pairing
Negation
Simple form
I cannot pair you cannot pair she cannot pair we cannot pair you cannot pair they cannot pair
V-ing form
I cannot be pairing you cannot be pairing she cannot be pairing we cannot be pairing you cannot be pairing they cannot be pairing
Perfect
I cannot have paired you cannot have paired she cannot have paired we cannot have paired you cannot have paired they cannot have paired
V-ing perfect
I cannot have been pairing you cannot have been pairing she cannot have been pairing we cannot have been pairing you cannot have been pairing they cannot have been pairing
Interrogative form
Simple form
can I pair? can you pair? can she pair? can we pair? can you pair? can they pair?
V-ing form
can I be pairing? can you be pairing? can she be pairing? can we be pairing? can you be pairing? can they be pairing?
Perfect
can I have paired? can you have paired? can she have paired? can we have paired? can you have paired? can they have paired?
V-ing perfect
can I have been pairing? can you have been pairing? can she have been pairing? can we have been pairing? can you have been pairing? can they have been pairing?
Interro-negative form
Simple form
can I not pair? can you not pair? can she not pair? can we not pair? can you not pair? can they not pair?
V-ing form
can I not be pairing? can you not be pairing? can she not be pairing? can we not be pairing? can you not be pairing? can they not be pairing?
Perfect
can I not have paired? can you not have paired? can she not have paired? can we not have paired? can you not have paired? can they not have paired?
V-ing perfect
can I not have been pairing? can you not have been pairing? can she not have been pairing? can we not have been pairing? can you not have been pairing? can they not have been pairing?