Tuesday, 2 April 2013

have, don't have to, must, mustn't

Hello to  everybody. Why don't you have a look at this? Source: Oxford

  1. Lesson C have to, don't have to, must, mustn't (1)
  2. Lesson C have to, don't have to, must, mustn't (2)
  3. can / can't, have to / don't have to
  4. had to / didn't have to / did you have to
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