状语从句的课件

1、adverbial clauses (1)adverbial clauses (1) you dont know me because i am nobody.when i came into the classroom, i felt nervous.if we try our best, we can make it._原因状语从句原因状语从句时间状语从句时间状语从句条件状语从句条件状语从句1.adverbial clauses of time:（时间状语从句）（时间状语从句）when, while, as, before, after, since, until(till), as so

2、on as2.adverbial clauses of reason(原因状语从句）原因状语从句）because, since, as3.adverbial clauses of condition(条件状语从句）条件状语从句）if, unlessa. when i came in, they were talking loudly.b. while he was away, lucy looked after his dog.c. as we sat down, andy came into the room.d. jim had to pay for the book because he

3、 lost ite. i didnt know it until you told me.f. please call me as soon as you get there.g. if it rains tomorrow, they will stay at home.h. you will not pass the exam unless you work hard.i. we must close the door before we leave.j. ive lived here since i was born.k. since you are here, please help m

4、e clean the room. when, as，while的用法比较的用法比较： （当（当时）时）表示主、从句的动作或状态同时、之前、之后发生表示主、从句的动作或状态同时、之前、之后发生正当正当时，边时，边边边）表示主、从句的动作或状态同时或几乎同时发生表示主、从句的动作或状态同时或几乎同时发生在在期间，期间， 在在之时之时）所引导的从句中的动词或状态是延续性的所引导的从句中的动词或状态是延续性的 when从句的动作在主句之前发生，只能用从句的动作在主句之前发生，只能用when，不能用，不能用as/while。when/ as从句的动作是延续性的，主句却是短暂的，从句的动作是延续性的，主

5、句却是短暂的，while, as, when都可用都可用 while/ as/ when主从句的两个动作同时进行，且都是延续性，只能用主从句的两个动作同时进行，且都是延续性，只能用whilewhile连接两个同时发生的短暂性动词，只能用连接两个同时发生的短暂性动词，只能用when 和和as，不能用，不能用while.a. _ he sat down, his mother came in. b. _ he ran to the stop, the bus had gone. c._ he was watching tv, his mother came in.d._ he was watchi

6、ng tv, his mother was cooking. since的用法的用法：since表示从过去某一时间或动作、事情起到目前为止，表示从过去某一时间或动作、事情起到目前为止，“自自.以以 来来”。1. 引导状语从句时，主句用现在完成时，从句中用一般过去时。引导状语从句时，主句用现在完成时，从句中用一般过去时。e.g. 自从他来到我们班以来自从他来到我们班以来,他的学习成绩提高了许多他的学习成绩提高了许多. his study has improved a lot since he came to our class.2. 常用句型：常用句型： it is (has been).+ s

7、ince +一般过去时一般过去时e.g. 自我开始学英语已有自我开始学英语已有5年了年了.(我已学了我已学了5年英语了年英语了.)it is five years since i began to learn english.(i have learned english for five years.) exercise 1 exercise 1choose the best answers:( )1. i was walking _ i heard a cry for help. a. while b. when c. as soon as d. until( )2. _ the day

8、went on, the weather got worse. a. before b. after c. as d. while( )3. i called him _ i got to his hometown. a. until b. while c. as soon as d. since( )4. he waited _ all the other people left the station. a. after b. since c. until d. not until( )5. he fell off the bike _ he knew what had happened.

9、 a. as soon as b. before c. until d. while( )6. please look after it for me _ i am away. a. while b. until c. as d. after( )7. while his father was singing, he _ the piano. a. played b. was playing c. playing d. plays( )8. i saw the accident when i _ past the museum. a. walked b. walking c. was walk

10、ing d. walkb cccbabc 原因状语从句原因状语从句 because, since, asbecause, since, as 用法比较用法比较： as she was late for class,she had to say sorry.1、because: 语气最强语气最强, 表示的是直接理由，通常放句中表示的是直接理由，通常放句中, 不能同不能同so连用。连用。 i was late because there was a traffic accident.2. since: “既然既然.” 表示对方已知的事实或理由，常放在句首表示对方已知的事实或理由，常放在句首, 不能

11、同不能同so连用。连用。since you have enough money, you can come and buy it3. as: “由于由于.” 语气较弱，较口语化，表明显的原因或已知的语气较弱，较口语化，表明显的原因或已知的 事实事实,常放在句首常放在句首,不能同不能同so连用。连用。 exercise2exercise21. the teacher must be strict with you _ they want you to make great progress. (because, as, since)2. _your father is well again, y

12、ou no longer have anything to worry about. (because, as, since)3. _ she was the oldest in her family, she had to look after them.(because, as, since)4. the ship changed its course because there was a storm.(同义句同义句) _5. because he was ill,he didnt go to school.(同义句同义句) _becausesinceasthe ship changed

13、 its course because of a storm.he was ill, so he didnt go to school.条件状语从句条件状语从句 if : if : 假如假如, ,如果如果if you work harder,you will succeed.e.g. 如果你更努力的话如果你更努力的话,你会成功你会成功.work harder,work harder,unless: unless: 除非除非we cant write to mary unless she tells us her address.e.g.我们不能给她写信我们不能给她写信,除非她告诉我们地址除非她

14、告诉我们地址.we cant write to mary if she doesnt tell us her address.and you will succeedor you wont succeed.exercise3exercise3翻译下列句子翻译下列句子:1.我们该趁热打铁我们该趁热打铁.(strike, iron)2.直到他告诉我，我才意识到我的错误直到他告诉我，我才意识到我的错误这小男孩哭喊着，直到他妈妈回来这小男孩哭喊着，直到他妈妈回来在他毕业后他去了西部工作在他毕业后他去了西部工作随着那天的到来我们变得越来越激动了随着那天的到来我们变得越来越激动了你父亲会生气的，除非你马上

15、去向他道歉你父亲会生气的，除非你马上去向他道歉我还没来得及说句话，他就走了我还没来得及说句话，他就走了如果红灯亮，我们该怎么办？如果红灯亮，我们该怎么办？we should strike while the iron is hot. i didnt realize my mistake until he told me. the little boy cried until his mother came back. after he graduated, he went to work in the west. as the day is coming, we get more and mo

16、re excited. your father will be angry unless you say sorry to him at once. before i could say a word, he left. what should we do if the lights are red?exerciseexercise 4 4complete the following passage, using conjunctions or the right forms of the given verbs: the weather was cold and wet. the wind

17、_(blow) andi could see thick snow on the ground. i went to buy some medicine for mother _ she was ill. _ i got to the bus station, a lot of people _(wait) for the bus. i _(remember)it was saturday and farmers went to sell theirvegetables._ about an hour, the bus came. _ it stopped, people crowded on

18、to it. _ i was too young, i could hardly get on. at last we all got on. but _ we waited for a long time, the bus still didnt start. some people _(lose) their patience and _(shout). a young man _(hit) something and the bus began to run. we all felt happy _ a woman cried, “wheres the driver?”was blowi

19、ngbecausewhenwere waitingrememberedafteras soon asasafterlostshoutedhituntilexercise 5exercise 5write down sentences as many as possible according to the passage, using adverbial clauses. it was snowy last monday. my friend jim woke up late. hedrove very fast to work. on the way, his car hit a tree. he was hurt. a mom