原因状语从句ppt课件.ppt

1、状语从句分类1. 表示时间表示时间 2. 表示原因表示原因 3. 表示结果表示结果 4. 表示目的表示目的5. 表示让步表示让步6. 表示比较表示比较7. 表示条件表示条件1一一:原因状语从句原因状语从句定义：如果从句表达的是定义：如果从句表达的是主句行为主句行为的原因的原因，就构成，就构成原因状语从句原因状语从句。引导词：引导词：because , since , as , for 2关于关于because(1)(1)becausebecause表示的原因是必然的因果关系，表示的原因是必然的因果关系，语气语气最强，通常放在主句之后，有时也放在主句之前最强，通常放在主句之后，有时也放在主句之前

2、。 You want to know why I am leaving? I am leaving because I am tired.(2)(2)回答回答whywhy提出的问题，只能用提出的问题，只能用because,because, 不能用不能用 其余三者。其余三者。 A：Why cant I go? B：Because you are too young. 3(3)because从句可用作表语，其余不能。从句可用作表语，其余不能。 This is because the earth is travelling around the sun. (4) 表示表示“的原因是因为的原因是因为”

3、这一意义时，这一意义时，一般要用一般要用The reason whyis that如：如：The reason why he cannot come is that he is ill. 4because后跟句子后跟句子I was late for school because I got up late.because of 后跟名词后跟名词We didnt go to the cinema because of the rain.5关于关于sincesince引导的原因状语从句一般放于主句之前引导的原因状语从句一般放于主句之前, 表示表示已知的、已知的、 显然的理由显然的理由(通常被翻译成

4、通常被翻译成“既既然然”)， 较为正式较为正式,语气比语气比because弱。弱。 Since you are free today, you had better help me with my maths. 既然既然今天你休息，今天你休息， 你最好帮我补习数学。你最好帮我补习数学。 6关于关于as as 引导原因状语从句时表示附带说明的引导原因状语从句时表示附带说明的“双双方已知的原因方已知的原因”，语气比，语气比since弱，较为正式，弱，较为正式，位置较为灵活位置较为灵活(常放于主句之前常放于主句之前)。 As it is raining, youd better take a tax

5、i. 既然在下雨，既然在下雨， 你最好乘出租汽车。你最好乘出租汽车。 I went to bed early, as I was very tired. 我睡得早，我睡得早， 因为我筋疲力尽了。因为我筋疲力尽了。 7For“因为因为, ,由于由于”表明附加或推断的理由，表明附加或推断的理由，引导的分句前常有逗号。引导的分句前常有逗号。for分句不放分句不放句首句首. . It rained last night, for the ground is wet this morning.8注意：注意：汉语习惯上说汉语习惯上说“因为因为所以所以”，但英语却不能将但英语却不能将because, sin

6、ce, as, for等等与与so( (所以所以) )连用。连用。9二：结果状语从句二：结果状语从句定义定义：表示由某个行为而导致的结果：表示由某个行为而导致的结果引导词引导词： so so.that， such.that 10So 因此因此Its going to rain, so take an umbrella when you go out.He worked too hard, so he fell ill again.11so.that 如此如此.以致于以致于1.so+形副形副thatHe was so glad that he couldnt say a word.The hal

7、l is so big that it can hold 2,000 people.Mother lives so far away that we hardly ever see her.122.so+形容词形容词a(an)可数名词单数可数名词单数thatHe is so good a boy that every teacherlikes him.It is so heavy a box that the little boycant carry it.133.somany/few/much/little复名复名(不可名不可名)+thatSoon there were so many pe

8、ople that they ate all the food.He has so little time that he cant go to the cinema with you.可数名词可数名词不可数名词不可数名词14suchthat“如此的如此的以致于以致于”表结表结果。果。1.sucha(an)形可数名词名词单数形可数名词名词单数thatMr Green is such a good teacher that everybody likes him.It was such an interesting film that everyone laughed.152.such形容词复数

9、名词不可数名词形容词复数名词不可数名词thatOur town has such fresh air that every visitor wants to come.16 1.so+形副形副that 2.so+形容词形容词a(an)单数名词单数名词that 3.somany/few/much/little复数名词复数名词(不可名不可名)+that So 强调的是形容词强调的是形容词 suchthat“如此的如此的以致于以致于”表结表结果。果。1.sucha(an)形可数形可数名词名词单数单数that2.such形复数形复数名词名词不可数不可数名词名词that Such 强调的是名词强调的是名

10、词171.她是如此的疲惫，以致于很快就睡着了。她是如此的疲惫，以致于很快就睡着了。 She was _ she _ quickly.2. 这是一本非常有趣的小说，以致于我读了三遍。这是一本非常有趣的小说，以致于我读了三遍。 It was _ novel that read it three times.3. 他跑得非常快，没人能追上他。他跑得非常快，没人能追上他。 He runs _ nobody can catch up with him.4. 玛丽有如此多的工作要做，以致于她整天呆在办公室。玛丽有如此多的工作要做，以致于她整天呆在办公室。 Mary had _ to do that she

11、 stayed at her office all day. sothat / suchthatso tired thatfell asleepsuch an interestingso fast thatso much work18三：目的状语从句三：目的状语从句定义：从句表达的是主句行为的目的定义：从句表达的是主句行为的目的主要的引导词有主要的引导词有: so that， in order that， 19They are hurrying so that they may not miss the train. 他们匆匆忙忙目的是为了不错过火车他们匆匆忙忙目的是为了不错过火车 They

12、are hurrying in order that they may not miss the train He works hard so that he can get good grades. He works hard in order that he can get good grades. So that 引导的目的状语从句中常常含有情态动引导的目的状语从句中常常含有情态动词词can, could, may, might, Would, should20区分区分In order that +句子句子So that +句子句子In order to do sth to do sth

13、 21四：让步状语从句四：让步状语从句表示尽管表示尽管.引导词引导词: though， although even if， even though22though, although, though, although在句首表“尽管”两者都可以用。不能与but连用。 下列情况只能用though： as though (=as if);好像 even if (=even though) 即使 在句末表示“然而” 231. _ there are too many people here, _ we have to find another house. A. Because; so B. Tho

14、ugh; but C. Since; / D. /; if2. This TV set is too dear, _ it gives you a better picture.A. or B. and C. if D. though3. _ he is very young, _ he knows several languageA. Though; but B. Because; so C. Though; / D. Because; /CDC244. He was _ tired _ he couldnt go on working. A. too; to B. such; that C

15、. so; that D. too; that5. She was _ we all like her.A. such a good singer B. such a good singer thatC. a very good singer that D. so good singer thatCB257. It was _ we went fishing in the open air yesterday.A. such a nice weather B. so nice weather thatC. such nice weather that D. a nice weather so thatC26