　　主从复合句由一个主句和一个或一个以上的从句构成。主句为句子的主体,从句只用作句子的一个次要成分,不能独立成为一个句子。从句通常由关联词引导,并由关联词将从句和主句联系在一起。如：While the grandparents love the children, they are strict with them.(爷爷奶奶们很爱孩子,同时对他们也严格要求。) / It seemed as if the meeting would never end.(看起来会议没完没了。) / Hurry up, or (else) you'll be late.(快点, 要不然就来不及了。) / However I cook eggs, the child still refuses to eat them.(不管我用什么方法煮鸡蛋,小孩还是不肯吃。)

　　2、分类：

　　从句按其在复合句中的作用,分为主语从句、表语从句、宾语从句、定语从句和状语从句等。（参见以下各条）

　　3、各从句在句子中的位置以及用法：

　　(1) 表语从句：在句子中作连系动词的表语的从句,它位于主句中的系动词之后。

　　例如：That is why he did not come to school yesterday. / It is because you are so clever.

　　(2) 宾语从句：在句子中作及物动词或介词的宾语。

　　①基本形式：（主句＋）连词+从句主语+从句谓语+...??

　　② 关于宾语从句连词的选择：

　　若从句来源于一个陈述句,那么,连词用that,在口语中that可以省略;

　　若从句来源于一个一般疑问句,连词则用if 或whether;

　　若从句来源于一个特殊疑问句,则连词就是疑问词(如what,who,where,when等)

　　例如：They believe that the computer will finally take the place of human beings.(他们相信计算机终将代替人类。) (从句本来就是陈述句)/ I wonder whether I should say something for him to the headmaster. (我不知道是不是该为他在校长跟前说点什么。) (从句来源于一般问句Shall I say something for him to the headmaster?) / He asked me where he could get such medicine. (他问我在哪儿能搞到那样的药。) (从句来源于特殊问句Where can he get such medicine? )

　　③ 宾语从句的时态问题：如果主句是现在时,从句则用现在某一时态,甚至可以用过去时；

　　如主句是过去时,从句则相应地使用过去某一时态,遇到客观真理时仍然用现在时。如：I think I will do better in English this term. (我想本学期我的英语会学得好点。) / The teacher asked the boy if the earth is round. (老师问那个男孩地球是不是圆的。)

　　④ 下列结构后面的从句一般也作为宾语从句看待：

　　be sorry / afraid / sure / glad +that从句,如：I’m sorry I’m late. (对不起,我迟到了。) /? I’m afraid he? isn’t? in? at? the moment. (恐怕他此刻不在家。)

　　(3) 状语从句：在复合句中作状语,其位置可以在主句前或主句后。状语从句可以分为时间、地点、原因、目的、结果、比较、让步、条件等几种。

《Section A Grammar focus 4a—4b》精品教案下载-巴彦淖尔市优质课

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教材

Unit 1 How can we become good learners?

Section A 1a—2d

Section A 3a—3b

Section A Grammar focus 4a—4c

Section B 1a—1e

Section B 2a—3b Self check

Unit 2 I think that mooncakes are delicious!

Section A 1a—2d

Section A 3a—3c

Section A Grammar focus 4a—4c

Section B 1a—1d

Section B 2a—3b Self check

Unit 3 Could you tell me where the restrooms are?

Section A 1a—2d

Section A 3a—3b

Section A Grammar focus 4a—4c

Section B 1a—1e

Section B 2a—3b Self check

Unit 4 I used to be afraid of the dark.

Section A 1a—2d

Section A 3a—3c

Section A Grammar focus 4a—4c

Section B 1a—1e

Section B 2a—2f

Section B 3a—3b Self check

Unit 5 What are the shirts made of?

Section A 1a—2d

Section A 3a—3c

Section A Grammar focus 4a—4c

Section B 1a—1e

Section B 2a—2e

Section B 3a—3b Self check

Unit 6 When was it invented?

Section A 1a—2d

Section A 3a—3c

Section A Grammar focus 4a—4c

Section B 1a—1e

Section B 2a—2e

Section B 3a—3b Self check

Unit 7 Teenagers should be allowed to choose their own clothes.

Section A 1a—2d

Section A 3a—3c

Section A Grammar focus 4a—4c

Section B 1a—1e

Section B 2a—2e

Section B 3a—3b Self check

Unit 8 It must belong to Carla.

Section A 1a—1c

Section A 2a—2d

Section A 3a—3c

Section A Grammar focus 4a—4c

Section B 1a—1d

Section B 2a—2e

Section B 3a—3b Self check

Unit 9 I like music that I can dance to.

Section A 1a—2d

Section A 3a—3c

Section A Grammar focus 4a—4c

Section B 1a—1d

Section B 2a—2e

Section B 3a—3b Self check

Unit 10 You are suppoed to shake hands.

Section A 1a—2d

Section A 3a—3c

Section A Grammar focus 4a—4c

Section B 1a—1d

Section B 2a—2e

Section B 3a—3b Self check

Unit 11 Sad movies made me cry.

Section A 1a—2d

Section A 3a—3c