I must watch you must watch she must watch we must watch you must watch they must watch
V-ing form
I must be watching you must be watching she must be watching we must be watching you must be watching they must be watching
Perfect
I must have watched you must have watched she must have watched we must have watched you must have watched they must have watched
V-ing perfect
I must have been watching you must have been watching she must have been watching we must have been watching you must have been watching they must have been watching
Negation
Simple form
I mustn't watch you mustn't watch she mustn't watch we mustn't watch you mustn't watch they mustn't watch
V-ing form
I mustn't be watching you mustn't be watching she mustn't be watching we mustn't be watching you mustn't be watching they mustn't be watching
Perfect
I mustn't have watched you mustn't have watched she mustn't have watched we mustn't have watched you mustn't have watched they mustn't have watched
V-ing perfect
I mustn't have been watching you mustn't have been watching she mustn't have been watching we mustn't have been watching you mustn't have been watching they mustn't have been watching
Interrogative form
Simple form
must I watch? must you watch? must she watch? must we watch? must you watch? must they watch?
V-ing form
must I be watching? must you be watching? must she be watching? must we be watching? must you be watching? must they be watching?
Perfect
must I have watched? must you have watched? must she have watched? must we have watched? must you have watched? must they have watched?
V-ing perfect
must I have been watching? must you have been watching? must she have been watching? must we have been watching? must you have been watching? must they have been watching?
Interro-negative form
Simple form
mustn't I watch? mustn't you watch? mustn't she watch? mustn't we watch? mustn't you watch? mustn't they watch?
V-ing form
mustn't I be watching? mustn't you be watching? mustn't she be watching? mustn't we be watching? mustn't you be watching? mustn't they be watching?
Perfect
mustn't I have watched? mustn't you have watched? mustn't she have watched? mustn't we have watched? mustn't you have watched? mustn't they have watched?
V-ing perfect
mustn't I have been watching? mustn't you have been watching? mustn't she have been watching? mustn't we have been watching? mustn't you have been watching? mustn't they have been watching?