原因状语从句课件.ppt

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1、状语从句分类,表示时间 表示原因 表示结果 表示目的表示让步表示比较表示条件,1,一:原因状语从句定义：如果从句表达的是主句行为的原因，就构成原因状语从句。引导词：because , since , as , for,2,关于becausebecause表示的原因是必然的因果关系，语气最强，通常放在主句之后，有时也放在主句之前。 You want to know why I am leaving? I am leaving because I am tired.(2)回答why提出的问题，只能用because, 不能用 其余三者。 A：Why cant I go? B：Because you

2、are too young.,3,(3)because从句可用作表语，其余不能。 This is because the earth is travelling around the sun. (4) 表示“的原因是因为”这一意义时，一般要用The reason whyis that如：The reason why he cannot come is that he is ill.,4,because后跟句子I was late for school because I got up late.because of 后跟名词We didnt go to the cinema because o

3、f the rain.,5,关于since,since引导的原因状语从句一般放于主句之前, 表示已知的、 显然的理由(通常被翻译成“既然”)， 较为正式,语气比because弱。 Since you are free today, you had better help me with my maths. 既然今天你休息， 你最好帮我补习数学。,6,关于as as 引导原因状语从句时表示附带说明的“双方已知的原因”，语气比since弱，较为正式，位置较为灵活(常放于主句之前)。 As it is raining, youd better take a taxi. 既然在下雨， 你最好乘出租汽车

4、。 I went to bed early, as I was very tired. 我睡得早， 因为我筋疲力尽了。,7,For“因为,由于”表明附加或推断的理由，引导的分句前常有逗号。for分句不放句首. It rained last night, for the ground is wet this morning.,8,注意：汉语习惯上说“因为所以”，但英语却不能将because, since, as, for等与so(所以)连用。,9,二：结果状语从句,定义：表示由某个行为而导致的结果引导词：so so.that， such.that,10,So 因此Its going to rai

5、n, so take an umbrella when you go out.He worked too hard, so he fell ill again.,11,so.that 如此.以致于,1.so+形副that,He was so glad that he couldnt say a word.The hall is so big that it can hold 2,000 people.Mother lives so far away that we hardly ever see her.,12,2.so+形容词a(an)可数名词单数thatHe is so good a bo

6、y that every teacherlikes him.It is so heavy a box that the little boycant carry it.,13,3.somany/few/much/little复名(不可名)+that,Soon there were so many people that they ate all the food.He has so little time that he cant go to the cinema with you.,可数名词,不可数名词,14,suchthat“如此的以致于”表结果。,1.sucha(an)形可数名词名词单数

7、that,Mr Green is such a good teacher that everybody likes him.It was such an interesting film that everyone laughed.,15,2.such形容词复数名词不可数名词that,Our town has such fresh air that every visitor wants to come.,16,1.so+形副that 2.so+形容词a(an)单数名词that 3.somany/few/much/little复数名词(不可名)+that So 强调的是形容词suchthat“

8、如此的以致于”表结果。1.sucha(an)形可数名词单数that2.such形复数名词不可数名词thatSuch 强调的是名词,17,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。 It was _ novel that read it three times.3. 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。 Mary had _ to do that she stayed at her

9、 office all day.,sothat / suchthat,so tired that,fell asleep,such an interesting,so fast that,so much work,18,三：目的状语从句,定义：从句表达的是主句行为的目的主要的引导词有:so that， in order that，,19,They 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 They are hurrying in order that they may not miss the trai

10、nHe 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词can, could, may, might, Would, should,20,区分In order that +句子So that +句子In order to do sth to do sth,21,四：让步状语从句,表示尽管.引导词:though， althougheven if， even though,22,though, althou

11、gh,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”,23,1. _ there are too many people here, _ we have to find another house. A. Because; so B. Though; but C. Since; / D. /; if,2. This TV set is too dear, _ it gives you a better picture

12、.A. or B. and C. if D. though,3. _ he is very young, _ he knows several languageA. Though; but B. Because; so C. Though; / D. Because; /,C,D,C,24,4. He was _ tired _ he couldnt go on working. A. too; to B. such; that C. so; that D. too; that,5. 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 that,C,B,25,7. 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 that,C,26,