1. Grammar : Must/Mustn’t

2. To talkaboutthingsyou’reobliged to do and notobliged to do, we can use ‘must’ or‘mustn’t’.

3. Must We usemustto expressanobligation. Itisstrongerthanshould. Youmust be home beforeitgetsdark.

4. We use mustn’t (mustnot) to expressprohibition. Youmustn’ttakeanydictionariesintotheexam. Youmustn’ttakethingsfromthe office withoutpermission. Mustn’t

6. Questions In short answers, werepeatmustratherthan use theauxiliarydo/does. Mustyoutellher? Yes, I must.NOT Yes, I do.