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Modal Verbs HAVE TO/  MUST SHOULD/ OUGHT TO
<ul><li>We use  must  (do)  and  have to  (do)  to say that it is necessary to do something.  </li></ul><ul><li>e.g. Well,...
<ul><li>You can only use  must  to talk about the  present  and  future :  </li></ul><ul><li>e.g. We   must  go now. </li>...
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