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Unit12 Don’t eat in class.
Words and expressions:
1.Which rules are these students breaking? 这些学生违反了
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哪些规定？
①这是由疑问词which 引导的特殊疑问句。Which 在本句中是疑问形容词，它还可以作疑问代词，“哪个，哪些” Which do you like better, classical music or popular music? Which sport is your favorite?
Which 用作疑问代词时可以独立使用， 用作疑问形容词后面须接名词，两种情况经过变化后可以互换使用。 Which hat is your sister’s? =Which is your sister’s hat?
②rule 在句中作名词，“规则，规定” We must obey school rules. 常见的词组：
obey a rule 遵守规定 break a rule 违反规定 carry out a rule 执行规定 abolish a rule 废除规定
③break 是动词，“破坏， 违反”，还可以表示“破坏，打破，打碎”。 The boy often breaks school rules. Who broke the window of the classroom? Break 作名词， “休息，中间，中断”。 Let’s take a ten-minute break.
2.Don’t arrive late for class.
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①本句是一个祈使句的否定句。祈使句是指动词原形开头，表达命令或者乞求的句子。其否定句是在句首加“Don’t”构成. Don’t listen to music in class. Don’t play basketball in the classroom. Don’t run in the hallways. ②区分arrive,get和which.
句中的arrive 表示“到达，抵达”，为不及物动词，后面加宾语需加介词at 或in。at后面为较小的场所，in 后面跟大地点。 When will he arrive at the airport? I will call you as soon as I arrive in Beijing.
单词 get 和reach 也有到达的意思，get 为不及物动词， 后面跟地点名词需加介词to， reach为及物动词，直接跟地点名词作宾语，当get 和arrive 后接副词时，不用介词。 The train arrives in Beijing at 8 o’clock. =The train gets to Beijing at 8 o’clock. =The train reaches Beijing at 8 o’clock.. What time did your father arrive home last night?
③late 在句子中作副词，也可以作形容词，其反义词是early, be late for +名词表示“……迟到”。 He often comes to school late. I do my homework until late at night. Don’t be late for school again.
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Better late than ever.
4 arrive late for 与be late for 意思相近，\迟到\○
Don't arrive （be）late for school. 上学别迟到。
I arrived （was）late for the meeting yesterday. 我昨天开会迟到了。
3.Don’t listen to music in the classroom or the hallways.
⑴句中的listen 表示“（注意的）听， 倾听”，为不及物动词，后面加介词to 接宾语，即：listen to sb. /sth. Do you like listening to classical music?
You should listen to your teacher carefully in class. 注意：区分 listen ，hear和sound
①listen 表示“听”强调的是动作，hear 强调的是结果，意思为“听见，听到”。
I listened carefully but I heard nothing. Can you hear someone singing in the next room? ②listen 可用于祈使句, 但hear不可以. Listen to me carefully. Don’t listen to music in class.
③listen 强调动作过程，故可以用进行时态，hear不可以. All the students are listening to the teacher carefully.
4sound\听起来\，它是系动词，后面接形容词等。不可用于进行时○
态。
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