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自己不一定 起積極作用。 . I attended a night school. 我上夜校。 4. I think somebody must have picked it up. must在此處表示推測 , 意為“一定”。英語中當(dāng)情態(tài)動詞后接 have done時 , 表達(dá)對過去的事情進(jìn)行推測 , 故 must have done something表示“過去一定做過了”這樣的意思。 . He’s playing outside. He must have finished his homework. 5. I’ll call them now to check if anybody has it. anybody pron. 任何人 常用于否定句或疑問句中 。 當(dāng)用于肯定 句中時 , 相當(dāng)于 any person, 意為“任何 人”。 . I will not tell anybody the secret. Is there anybody in the office? Anybody could do it! 根據(jù)句意 , 從括號內(nèi)選擇合適的單詞填空。 1. Amy has practiced dancing for five hours. She ______ (must / can’t) be very tired. 2. Miss Yang ______ (must / can’t) be at home. She has gone to Shanghai. 3. Don’t play on the street. You ______ (could /can’t) be hurt by cars. must can’t could 4. Bruce _______ (must / might) pass the exam. I’m not sure. 5. I can’t find my pen at school. It _______ (could / can’t) be at home. could might 1. Recite the conversation in 2d. 2. Finish the exercises in the workbook