1、 2017、2学 科高一英语备课人廉雪芬M3U1 Grammar and usage 2第 7 课时总第_7_课时Learn to use conjunctions that, if/whether.Learn to use conjunctions that, if/whether. How to use that/if/whether in noun clauses.A Computer教 与 学Step1. Revision将下列句子改成主语从句She sensed something. A tall man was staring at her.She sensed that a ta
2、ll man was staring at her.Step3. Noun Clauses一that 的用法当从句为陈述句时用that引导1关于that引导的主语从句特点：无意义，不作任何句中成分，只起连接作用，不可以省略！That he is still alive is unbelievable.That we shall be late is certain.Its unbelievable that he is still alive.Its certain that we shall be late.2 关于that引导的宾语从句特点：无任何实际意义，也不作任何句子成分，只是起连接作
3、用，且常常省略。I think (that) English is easy to learn.You said (that) you like your mother very much.特殊情况:（1） 用it作形式宾语时，that不省略。I find it necessary that we should study English.（2）.及物动词后有两个宾语从句时，第二个that不可以省略。He said (that) he would go there the next day and that his family wouldnt go there.（3） 与动词相隔离的宾语从句
4、一般不省略that.The teacher tells us very often that we should study hard3关于that引导的表语从句that 引导表语从句，用来表示某一事实，也能表示某人的观点，意见，要求和希望等,一般不能省略。The problem is that her parents couldnt accept me.4关于that引导的同位语从句特点：对前面的名词作进一步的说明，无实际意义，不作任何成分，但不可以省略。备 注教 与 学备 注 (1).同位语从句的格式：名词.+ 连接词 + 从句(2).能接同位语从句的名词有：Fact,idea, news
5、, order, belief, suggestion, advice ,information等抽象名词 (3).连接词通常是that,也可根据含义选用其它连接词Whether, what, when, where 等来引导同位语从句。The news that our team won the first prize excited all of us.二 if 和whether 的用法:当从句是需要用yes/no 回答的一般疑问句时，用whether/if 引导，意为“是否”从句用陈述语序if 和whether的用法区别介词后面的宾语从句不能用if，只用whethereg: I worr
6、y about whether I hurt her feeling.whether可以引导主语从句,但if不能.eg:Whether it is going to clear up keeps me wondering. It is still a puzzling problem whether there are living things on the Mars.当whether后紧跟or not时或or连接两个选择时,不用if.eg: I dont know whether I will stay or not. 与否whether we will go swimming or st
7、ay at home depends on the weather. 是还是表语从句和同为语从句一般也只用whether 归纳:a.主语从句、表语从句、同位语从句、介词后面的宾语从句只能用whether，不能用if ；b.后面紧跟 or not 时, 用whetherStep3. Practice用if 或whether 填空1. I dont know _ Ill be free tomorrow.2. I dont know _ or not Ill be free tomorrow.3. The question is _ this book is worth writing.4. It
8、 depends on _ we will have enough money.5. _ they can do it matters little to us.6._ you are not free tomorrow , Ill go without you.Keys:1 whether/if 2 whether 3 whether 4 whether 5 whether 6 If 如Step3. HomeworkReview Noun Clausesthat 的用法 if 和whether 的用法 主语从句、表语从句、同位语从句、介词后面的宾语从句只能用whether，不能用if ；后面紧跟 or not 时, 用whether