I can lever you can lever he can lever we can lever you can lever they can lever
V-ing form
I can be levering you can be levering he can be levering we can be levering you can be levering they can be levering
Perfect
I can have levered you can have levered he can have levered we can have levered you can have levered they can have levered
V-ing perfect
I can have been levering you can have been levering he can have been levering we can have been levering you can have been levering they can have been levering
Negation
Simple form
I cannot lever you cannot lever he cannot lever we cannot lever you cannot lever they cannot lever
V-ing form
I cannot be levering you cannot be levering he cannot be levering we cannot be levering you cannot be levering they cannot be levering
Perfect
I cannot have levered you cannot have levered he cannot have levered we cannot have levered you cannot have levered they cannot have levered
V-ing perfect
I cannot have been levering you cannot have been levering he cannot have been levering we cannot have been levering you cannot have been levering they cannot have been levering
Interrogative form
Simple form
can I lever? can you lever? can he lever? can we lever? can you lever? can they lever?
V-ing form
can I be levering? can you be levering? can he be levering? can we be levering? can you be levering? can they be levering?
Perfect
can I have levered? can you have levered? can he have levered? can we have levered? can you have levered? can they have levered?
V-ing perfect
can I have been levering? can you have been levering? can he have been levering? can we have been levering? can you have been levering? can they have been levering?
Interro-negative form
Simple form
can I not lever? can you not lever? can he not lever? can we not lever? can you not lever? can they not lever?
V-ing form
can I not be levering? can you not be levering? can he not be levering? can we not be levering? can you not be levering? can they not be levering?
Perfect
can I not have levered? can you not have levered? can he not have levered? can we not have levered? can you not have levered? can they not have levered?
V-ing perfect
can I not have been levering? can you not have been levering? can he not have been levering? can we not have been levering? can you not have been levering? can they not have been levering?