slocawber what can we use for the past simple of 'mustn't'? I think we could use 'couldn't' or 'not allowed to' there. For example: You mustn't touch anything in this house without their permission.
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slocawberwhat can we use for the past simple of 'mustn't'?
slocawberwhat can we use for the past simple of 'mustn't'?couldn't or wasn't/weren't allowed to, as suggested above, are fine, as is was/were forbidden to.