2016高考英語情態動詞全解析
--well, it ______ be big--that's not important.
a. mustn't b. needn't c. can't d. won't
【解析】something big?此處意為：must it be big? 回答者的意思是：房子不必太大—那并不重要。
【答案】b
(2) must的否定形式mustn’t表示禁止，意思是“不能，不許”。例如：
when i was young, i was told that i ______ play with matches
a. wouldn't b. needn't c. mustn't d. daren't
【解析】當我年輕的時候，（家人）就一直告誡我千萬不要玩火柴。
【答案】c
(3) must用于條件句或疑問句中，可以用來表示責備、抱怨的感情色彩，意思為“偏要，硬要、干嘛”。例如：
①—may i smoke here ?
—if you ____, choose a seat in the smoking section.
a. should b. could c. may d. must
②john, look at the time. ___________ you play the piano at such a late hour?
a.must b.can c.may d.need