13 A: Can you dpruisvheyaocuarrwaatythoenatogeaobfus in sEenvgelnatneden? in England? B: Y_N_eo_s,,_ww_e_e_c__ac__na__n’_t_..HHoowwaabboouuttiinnCChhiinnaa?? A: No, we _c_a_n_’_t _e.ither.
变为一般疑问句直接把must 提前,
肯定回答:Yes,主语+must。
否定回答:No,主语+needn’t. 或 No, 主语+don't have to.
They must finish their homework right now.
否定句:They mustn’t finish their homework right now 一般疑问句: Must they finish their homework right now? 肯定回答: Yes, they must. 否定回答: No, they needn’t .
don’t have to
不必
你绝对不要告诉他这件事。(可能是秘密)
You mustn’t tell him about it.
你不必告诉他这件事。(他可能知道了或者 没有必要让他知道)
You don’t have to tell him about it.
5. must 与 have to 的区别
Talk
Now work in pairs. Tell each other three things you must do at home and three things you mustn’t do. Are your home rules different or the same?