【学案】 Unit 1 Grammar Predicative clauses 学案-人教版（2019）选择性必修第二册

1、选择性必修二 Unit 1 Science and scientists 第四课时Grammar-predicative clausesTeaching objective: master the target grammar- predicative clauses.Teaching focus: to use the grammar correctly.Teaching procedure:【课前预习案】观察下面句子，注意划横线部分：1.The person stood in front of you just now is headmaster. 2.The door remained

2、closed. 3.My job is to teach you English. 4.The reason why he came late was that his clock didnt work. 【课内探究案】1.What is the predicative？表语是用来说明主语的身份、性质、品性、特征和状态的，表语常由名词、代词、数词、动词过去分词、动词的-ing形式、副词、介词短语、形容词、不定式和从句等来充当。2.表语从句的定义:The question is difficult.（ 表 ）The question is who will do it.（ 表 ）在复合句中做表语

3、的从句，叫做表语从句。它位于主句的系动词之后，对主语进行解释说明，使主语的内容具体化。3.可以接表语从句的系动词有：（1）状态系动词：be （2）感官系动词：feel , seem , look, appear ,sound, taste , smell （3）持续系动词：stand , lie , remain ,keep, stay（4）变化系动词：become ,get , grow , turn , go , come, run, fall（5）终止系动词：prove, turn out 4. 引导词从属连词：that / whether /as if /as though (if不引

4、导表语从句)连接代词：who / whom / whose / which/ what 连接副词：when / where / why / how (1)that that 在从句中仅起连接作用，无实际意义，在句中不作任何成分，不能省略。My opinion is that its getting better and better.(2)whether whether 在句子中不充当任何成分，但具有“是否”的意义。注意：if不能引导表语从句。1 The question is whether it is worth doing.2 The question is whether we can

5、 win them.(3)as if/throughas if / though引导表语从句时，在句子中不充当任何成分，但有意义。译为：似乎，好像。1 He looks as if he were a rich man.2 It sounds as if someone is knocking at the door.as if/as though引导的表语从句如果是事实，就用陈述语气，如果与事实不符，就用虚拟语气(主句一般现在时，从句就用一般过去时。主句是一般过去时，从句用过去完成时 )。The young man with long hair looks as if he were a g

6、irl. Dark clouds are gathering. It looks as if its going to rain.(4) what 在表语从句中充当主语、宾语或表语 表示什么，什么样子，或所的（人或事） The question is what caused the accident. That mountain is no longer what it used to be . What he told you was what had been discussed at the meeting.(5)who 在表语从句中充当主语、宾语或表语,表示谁1. The proble

7、m is who could do the work2. My trouble is who (whom) I can turn to.3. Could you tell me who he is?(6) which 在引导表语从句时,常充当定语，表语 表示哪一个,哪一些。 I read about it in some book or another,but what I dont know is which (book) it is. (7)where, when, why, how除在句中起连接作用外，在从句中还充当时间、地点、方式、原因状语，本身具有词义。 This is why sh

8、e was late for the meeting.这就是她会议迟到的原因。 The question is how he did it.问题是他如何做此事的。 That is where he was born.那就是他出生的地方。注意：主语一般不用reasonThat/It is /was why 那是的原因That/It / is/ was because 那是因为 He was ill. Thats because he was sent to the hospital.  (强调原因）He was ill. Thats why he was sent to the hos

9、pital.  （强调结果）5. 使用虚拟语气的表语从句My suggestion is that we (should) start early tomorrow.在表示建议、劝告、命令含义的名词后的表语从句，谓语动词需用“should+动词原形” 表示，should可省略。常见的词有：advice, suggestion, order, proposal等。 【课后巩固案】I.单项选择1.The reason why he failed is _he was too careless.A. because B. that C. for D. because of2.Th

10、is is _ Sara was late for the meeting. A. why B. what C. how D. That3. The reason is _ he is unable to operate the machine. A. because B. why C. that D. Whether4The problem is _to take the place of TedA. who can we get B. what we can getC. who we can get D. that we can get5. What I want to know is _

11、 he likes the gift given by us.A.that B. if C. whether D.不填6. The reason is_I missed the bus. A. that B. when C. why D. what7. Thats _ the Party called on us to do. A. why B. what C. how D. that 8. The reason is _ he is unable to operate the machine. A. because B. why C. that D. Whether9 .That is _

12、they separated. A. that B. what C. which D. where 10.Jane is no longer _ she was four years ago. A. what B. which C. that D. when II.选词填空as if that what who when how why whose which whetherA: Absolutely ! You may not believe it, but that was _happened at the initial stage of our group's research

13、 on developing a vaccine for malaria.B: Yes, it is. And it seemed _all the theories were useful, but the fact was_ we couldn't persuade one another that one theory was better than another.C:Exactly The problem was not about _all our theories were equally good, but in deciding _theory to depend u

14、pon.D: We realized that what we cared about was not_ aspect we needed to develop a theory in, but rather _we can reduce the cost of a vaccine without reducing its effect!E: You're right. At last, we became focused on the key issue, which was _we had to Cary out the research in the first place.III.完成句子1)The fact was _.事实是他没有做真正的尝试。2) The question is _.问题是这部电影是否值得看。3) Now _ she