人教新课标必修三+Unit+4+Astronomy-Grammar[课件].ppt

1、Unit4 Grammar 名词性从句之主语从句,Ma Dan dan 2011-4-15,展,示,目,1.了解并掌握主语从句的相关概念 2.完成与主语从句相关的练习 3.重点：It 做形式主语的各种句式及虚拟语气的使用。 4. 难点：引导主语从句的连接词的使用。,目标展示,身,导,入,热,找出下列各句的相似之处 What he did is surprising . 2. That we go swimming every day does us a lot of good. 3.When well finish translating the book depends on the tim

2、e. 4.Whoever makes mistakes must correct them.,热身导入,主,学,习,自,主,Turn to page 53 in your workbook and see note 1，2. 学习任务： 1.了解主语从句的定义 2.掌握引导主语从句的连接词的用法。,自主学习,定义： 用作主语的从句叫主语从句，它是名词性从句之一。引导主语从句的连接词有： 连词that, whether； 连接代词who, what和which； 连接副词when, where, how和why.,自主学习,Continue to look at note 3. 1.连词that

3、，whether在主语从句中做成分吗？ 2.连词if 能引导主语从句吗？ 3.连接代词who, what和which在主语从句中能做什么成分？ 4.连接副词when, where, how和why在主语从句中能做什么成分？,自主学习,if可以引导主语从句,但不能用于句首,而应该放在句尾, 用it做形式主语. whether与If做“是否”讲引导名词从句, 区别如下: If 1.不能用在句首 2.不能引导主,表,同从句 3.可以引导宾语从句,但不用在介词之后,自主学习,知识小结,连接代词，也称疑问代词。一共九个,包括： who, whom, whose, what, which, whoever

4、, whomever, whatever ，whichever, 代词相当于名词，因此，连接代词在主语从句中可做主宾表同。,自主学习,知识小结,作,探,究,合,1.他们是否卖掉这所房子还没有决定。 _they will sell the house is not yet decided. 这里能用if代替whether吗？为什么？ if可以引导主语从句,但不能用于句首,而应 放在句尾, 用it做形式主语.,汉译英,合作探究,2.凡是这里说的话都应当保密。 _ was said here must be kept secret. 3.凡犯了错误的人都必须改正。 _ makes mistakes

5、must correct them. 问题： 1.whenever/wherever能引导主语从句吗？,合作探究,4.老师今天说的话是十分正确的。 _the teacher said today was quite right. 5.他们急需帮助，这是十分明显的。 _ they are badly in need of help is quite clear.,汉译英,合作探究,引导主语从句时，什么情况下用that，什么情况下用what？ 小提示： 由连词that引起的主语从句,这类句子在大多数情况下会放到整个句子的后部去，而用代词it作形式主语。,合作探究,主,学,习,自,主,Continu

6、e to look at note 4 1) It is + adj. / n. +从句 It is a pity/shame that. 遗憾的是 It is possible that. 很可能 It is unlikely that. 不可能 2) It +不及物动词+从句 It seems/appears that. 似乎 It happened that. 碰巧,自主学习,3) It + be +过去分词+从句 It is said that. 据说 It is known to all that. 众所周知 It is reported that. 据报道 It is believ

7、ed that. 据信;人们相信 It is suggested that. 有人建议,自主学习,Continue to look at 5 特殊强调: 用于It is +important / natural / necessary / impossible /或表示建议要求命令的词的过去分词+that.句型中, 主语从句应使用虚拟语气, 谓语动词用“should + 动词原形”的形式。,自主学习,馈,练,习,反,1. _ he said at the meeting astonished everybody present. 2. _ the 2000 Olympic Games will

8、 be held in Beijing is not known yet. 3. _ well go camping tomorrow depends on the weather. 4. _ leaves the room last ought to turn off the lights.,What,Whether,Whether,Whoever,反馈练习,6. _ is a fact that English is being accepted as an international language. 7.It worried her a bit _ her hair was turn

9、ing grey. 8. The Foreign Minister said, “_ is our hope that the two sides will work towards peace.”9. After Yang Liwei succeeded in circling the earth, _ our astronauts desire to do is walking in space.,It,that,It,what,反馈练习,击,高,考,直,1. The other day, my brother drove his car down the street at _ I th

10、ought was a dangerous speed. (2004 上海 春 38) A. as B. which C. what D. that,解析: I thought 是插入语,可以把它去掉不考虑. what 引导宾语从句,在从句中作主语.宾语从句作at的宾语.,直击高考,2. _ in the regulations that you should not tell other people the password of your email account.（2005 上海-38） A. What is required B. What requires C. It is re

11、quired D. It requires,解析: “It is required that ”是一个固定句式，it作形式主语, that引导的从句为真正的主语。,直击高考,3. _ the 2000 Olympic Games will be held in Beijing is not known yet. 高考真题 A. Whenever B. If C. Whether D. That,答案是C。“2000年奥林匹克运动会是否在北京举行还不知道。”,直击高考,4. _ he said at the meeting astonished everybody present. 高考真题 A

12、. What B. That C.Which D. Whether,答案是A。“他在会上的发言使到会的每一个人都感到惊讶” what 表示“(所说的话)” ,相当于The words (that + /which) he said at the meeting,直击高考,5. _ he has become a rich man is known to all in our town. 高考真题 A. Because B. That C. / D. What,答案是B。“他变成了富翁, 这是我们镇上下班人人皆知的事。”根据句意, 须用that 引导的主语从句。that 在从句中不担任任何成分, 只起连接作用. That引导主语从句的时候不可省略。,直击高考,