Student or Learner
The must & can't are have the same grammar structure
be adj l/you/he + must/can't be v-ing (doing/joking/going etc.) do (know/get/have etc.)
But I don't have any idea how to distinguish the words, what kind of its are belong to "be V-ing" or "do".
Could you offer some examples to me?
Last edited by puman0727; 27-Aug-2013 at 18:46. Reason: modify the form