八年级英语上册 Unit 4 Lesson 20 No Stopping because引导的原因状语从句课件 （新版）冀教版

BecauseBecause引导的原因状语从句引导的原因状语从句引导原因状语从句的从属连词主要的有引导原因状语从句的从属连词主要的有because, as, because, as, since, for, seeing (that), now (that), considering (that)since, for, seeing (that), now (that), considering (that)，in thatin that等：等： The woolly shrank because it was washed badly. The woolly shrank because it was washed badly. 毛衣因洗得不得法而缩水。毛衣因洗得不得法而缩水。 I cant get to sleep because of the noise outside. I cant get to sleep because of the noise outside. 由于外面声音嘈杂我睡不着。由于外面声音嘈杂我睡不着。 Since As weve no money, we cant buy it. Since As weve no money, we cant buy it. 由于我们没钱，我们无法购买它。由于我们没钱，我们无法购买它。 Seeing that its raining, wed better stay indoors. Seeing that its raining, wed better stay indoors. 既然外边在下雨，我们最好待在室内。既然外边在下雨，我们最好待在室内。 Now that you are here, youd better stay. Now that you are here, youd better stay. 你既然来了，最好还是留下吧你既然来了，最好还是留下吧( (既来之，则安之既来之，则安之) )。(1)(1)because because 语势最强，表示不知道的原因用语势最强，表示不知道的原因用becausebecause，即说话人认为听话人不知道。因此，即说话人认为听话人不知道。因此becausebecause从句是全句最重要的部分，通常被放置从句是全句最重要的部分，通常被放置于主语之后；有时也放在主句之前。于主语之后；有时也放在主句之前。 You want to know why I am leaving? You want to know why I am leaving? I am leaving because I am fed up. I am leaving because I am fed up.(2)(2)回答回答whywhy提出的问题，只能用提出的问题，只能用becausebecause。 A A：Why cant I go?Why cant I go? B B：Because you are too young. Because you are too young. (3)(3)在强调句中强调原因，只能用在强调句中强调原因，只能用becausebecause引导。引导。 Its because he is kind that we like him. Its because he is kind that we like him. (4)because(4)because从句可用作表语。这是主语一般都从句可用作表语。这是主语一般都是是it it， thisthis， thatthat。 This is because the earth is traveling around This is because the earth is traveling around the sun. the sun. （5 5）关于）关于notbecausenotbecause结构结构 该结构中的否定词有时否定主句，有时否定从句，一般要根据句子该结构中的否定词有时否定主句，有时否定从句，一般要根据句子的意思作出正确合乎逻辑的理解。若的意思作出正确合乎逻辑的理解。若notnot否定主句，最好在否定主句，最好在becausebecause之前用逗号，否则会引起歧义，如下句在没有特定上下文时就有两之前用逗号，否则会引起歧义，如下句在没有特定上下文时就有两种解释：种解释： I didnt go because I was afraid. I didnt go because I was afraid. 我没有去是因为怕。我没有去是因为怕。/ / 我不是因为怕才去。我不是因为怕才去。 不过若不过若becausebecause之前有之前有justjust修饰，一般认为修饰，一般认为not not 是否定从句的：是否定从句的： You shouldnt get angry just because some people speak ill of you. You shouldnt get angry just because some people speak ill of you. 你不要因为有人说你坏话而生气你不要因为有人说你坏话而生气。（6 6）becausebecause习惯上不与习惯上不与soso连用。汉语习惯上说连用。汉语习惯上说“因为因为所以所以”，但英语习惯上却不能将，但英语习惯上却不能将 soso与与because because 连用：连用： 例：因为下雨，所以我们呆在家里。例：因为下雨，所以我们呆在家里。 正：正：Because it was raining, we stayed at home. Because it was raining, we stayed at home. It was raining, so we stayed at home. It was raining, so we stayed at home. 误：误：Because it was raining, so we stayed at home. Because it was raining, so we stayed at home. （7 7）because because 从句与从句与 because ofbecause of短语的转换短语的转换BecauseBecause引导的原因状语从句有时可与引导的原因状语从句有时可与because of because of 短语转换，短语转换，because ofbecause of后加的原因可以为好或坏，但最正规的还是后加的原因可以为好或坏，但最正规的还是becausebecause。He cant come because he is ill. He cant come because he is ill. He cant come because of his illness. He cant come because of his illness. 他因病不能来。他因病不能来。 I said nothing about it because his wife was there.I said nothing about it because his wife was there.I said nothing about it because of his wifes being there. I said nothing about it because of his wifes being there. 因为他妻子在那儿，我对此事只字未提。因为他妻子在那儿，我对此事只字未提。 一、填入恰当的连词一、填入恰当的连词1. I didnt go to school yesterday _ I was ill.2. _ everybody is here, lets begin our meeting.3. _ you are in poor health, you should not stay up late.4. I asked her to stay to tea, _ I had something to tell her.5. _ all the passengers are here, why dont we start at once?6. Bill wont make any progress _ he doesnt study harder than before.7. He might have gone to bed, _ the light went out. Thank you!Thank you!