I can fair you can fair he can fair we can fair you can fair they can fair
V-ing form
I can be fairing you can be fairing he can be fairing we can be fairing you can be fairing they can be fairing
Perfect
I can have faired you can have faired he can have faired we can have faired you can have faired they can have faired
V-ing perfect
I can have been fairing you can have been fairing he can have been fairing we can have been fairing you can have been fairing they can have been fairing
Negation
Simple form
I cannot fair you cannot fair he cannot fair we cannot fair you cannot fair they cannot fair
V-ing form
I cannot be fairing you cannot be fairing he cannot be fairing we cannot be fairing you cannot be fairing they cannot be fairing
Perfect
I cannot have faired you cannot have faired he cannot have faired we cannot have faired you cannot have faired they cannot have faired
V-ing perfect
I cannot have been fairing you cannot have been fairing he cannot have been fairing we cannot have been fairing you cannot have been fairing they cannot have been fairing
Interrogative form
Simple form
can I fair? can you fair? can he fair? can we fair? can you fair? can they fair?
V-ing form
can I be fairing? can you be fairing? can he be fairing? can we be fairing? can you be fairing? can they be fairing?
Perfect
can I have faired? can you have faired? can he have faired? can we have faired? can you have faired? can they have faired?
V-ing perfect
can I have been fairing? can you have been fairing? can he have been fairing? can we have been fairing? can you have been fairing? can they have been fairing?
Interro-negative form
Simple form
can I not fair? can you not fair? can he not fair? can we not fair? can you not fair? can they not fair?
V-ing form
can I not be fairing? can you not be fairing? can he not be fairing? can we not be fairing? can you not be fairing? can they not be fairing?
Perfect
can I not have faired? can you not have faired? can he not have faired? can we not have faired? can you not have faired? can they not have faired?
V-ing perfect
can I not have been fairing? can you not have been fairing? can he not have been fairing? can we not have been fairing? can you not have been fairing? can they not have been fairing?