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1、UNIT 4 ASTRONOMY:the science of the stars语法探究 Teaching aims: Grasp the attributive clause and use it freely课前自学（ SBP29 Discovering useful structures parts2-3）语法知识精讲主语从句在复合句中作主句的主语，引导主语从句的有从属连词that, whether以及连接代词who, what, which, whoever, whatever, whichever, 和连接副词when, where, why, how等。例如:That she w
2、as chosen made us very happy.她当选了我们很高兴。What caused the accident is a complete mystery.什么导致了这次事故还完全是个谜。Whoever comes to the party will receive a present.参加聚会的每个人都将收到份礼物。注意：上述例句中的主语从句都在句首，但为了使句子结构平衡，避免头重脚轻，常用it作形式主语，而把从句放在后面。例如：It is a pity that she has made such a mistake.她犯了这样一个错误，真遗憾。Its reported t
3、hat three people were killed in the accident.据报道，事故中三人丧生。语法同步练习用适当的连词填空1._ he said at the meeting surprised us greatly.2. It has been found _plastics can be widely used in industry. 3. It worried her a lot _her wallet was lost. 4. Can you tell me_ that man was?5. I wonder _we can do about the problem of pollution.6. I know nothing about her but_ she is from Canada.7. The reason why he has been such a success is_ he never gives up.8._is troubling me is _I dont have any experience in this kind of work.语法1.What,2.that 3.that 4.who 5.what 6.that7.that8.what,that1