I can lever you can lever she can lever we can lever you can lever they can lever
V-ing form
I can be levering you can be levering she can be levering we can be levering you can be levering they can be levering
Perfect
I can have levered you can have levered she 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 she 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 she cannot lever we cannot lever you cannot lever they cannot lever
V-ing form
I cannot be levering you cannot be levering she cannot be levering we cannot be levering you cannot be levering they cannot be levering
Perfect
I cannot have levered you cannot have levered she 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 she 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 she lever? can we lever? can you lever? can they lever?
V-ing form
can I be levering? can you be levering? can she be levering? can we be levering? can you be levering? can they be levering?
Perfect
can I have levered? can you have levered? can she 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 she 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 she 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 she 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 she 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 she not have been levering? can we not have been levering? can you not have been levering? can they not have been levering?