Question

You look very tired and you must have been preparing for the coming examination yesterday evening, _________ you ?

A．didn’t you

B．haven’t

C．weren’t

D．hadn’t

Answer 1

C

試題分析：
當(dāng)陳述部分帶有情態(tài)動(dòng)詞must表示“必須”時(shí)，疑問部分用mustn’t。如：
　　You must work hard next term, mustn’t you?
　　I must answer the letter, mustn’t I?
但若表推測(cè)這層含義時(shí)，不能用must，而要根據(jù)陳述部分must之后的動(dòng)詞而定，如果句子中有明確的過去時(shí)間，反意疑問部分與must之后的動(dòng)詞有關(guān)，不可用haven’t的形式。如：
　　You must have made a mistake, haven’t you?
　　They must have seen the film last week, didn’t they?
　　He must be in the library, isn’t he?故本題中選C.
點(diǎn)評(píng)：反意疑問句是高一必修第三單元語(yǔ)法點(diǎn)，對(duì)于反意疑問句平時(shí)學(xué)習(xí)中要注意加強(qiáng)記憶各種形式，做到胸有成竹。