I can pair you can pair he can pair we can pair you can pair they can pair
V-ing form
I can be pairing you can be pairing he can be pairing we can be pairing you can be pairing they can be pairing
Perfect
I can have paired you can have paired he 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 he can have been pairing we can have been pairing you can have been pairing they can have been pairing
Negation
Simple form
I can't pair you can't pair he can't pair we can't pair you can't pair they can't pair
V-ing form
I can't be pairing you can't be pairing he can't be pairing we can't be pairing you can't be pairing they can't be pairing
Perfect
I can't have paired you can't have paired he can't have paired we can't have paired you can't have paired they can't have paired
V-ing perfect
I can't have been pairing you can't have been pairing he can't have been pairing we can't have been pairing you can't have been pairing they can't have been pairing
Interrogative form
Simple form
can I pair? can you pair? can he pair? can we pair? can you pair? can they pair?
V-ing form
can I be pairing? can you be pairing? can he be pairing? can we be pairing? can you be pairing? can they be pairing?
Perfect
can I have paired? can you have paired? can he 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 he have been pairing? can we have been pairing? can you have been pairing? can they have been pairing?
Interro-negative form
Simple form
can't I pair? can't you pair? can't he pair? can't we pair? can't you pair? can't they pair?
V-ing form
can't I be pairing? can't you be pairing? can't he be pairing? can't we be pairing? can't you be pairing? can't they be pairing?
Perfect
can't I have paired? can't you have paired? can't he have paired? can't we have paired? can't you have paired? can't they have paired?
V-ing perfect
can't I have been pairing? can't you have been pairing? can't he have been pairing? can't we have been pairing? can't you have been pairing? can't they have been pairing?