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