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 mustn't lever you mustn't lever she mustn't lever we mustn't lever you mustn't lever they mustn't lever
V-ing form
I mustn't be levering you mustn't be levering she mustn't be levering we mustn't be levering you mustn't be levering they mustn't be levering
Perfect
I mustn't have levered you mustn't have levered she mustn't have levered we mustn't have levered you mustn't have levered they mustn't have levered
V-ing perfect
I mustn't have been levering you mustn't have been levering she mustn't have been levering we mustn't have been levering you mustn't have been levering they mustn't 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
mustn't I lever? mustn't you lever? mustn't she lever? mustn't we lever? mustn't you lever? mustn't they lever?
V-ing form
mustn't I be levering? mustn't you be levering? mustn't she be levering? mustn't we be levering? mustn't you be levering? mustn't they be levering?
Perfect
mustn't I have levered? mustn't you have levered? mustn't she have levered? mustn't we have levered? mustn't you have levered? mustn't they have levered?
V-ing perfect
mustn't I have been levering? mustn't you have been levering? mustn't she have been levering? mustn't we have been levering? mustn't you have been levering? mustn't they have been levering?