第十五讲 原因状语从句 2022中考英语百日打卡考点提分译林牛津版

第十五讲 原因状语从句 一、原因状语从句的种类 1.用 because 引导 (语气最强) 例：The woolly shrank because it was washed badly. 毛衣因为洗涤的方法不好而缩水。 I can’t get to sleep because of the noise outside. 由于外面声音嘈杂我睡不着。 2.用since引导(语气较弱) 例：Since we’ve no money, we can’t buy it. 由于我们没钱，我们不能购买它。 3.用 as 引导(语气较弱) 例：As you were not here, I left a message. 二，原因状语之间的区别 1.because引导的原因状语 从句一般放于主句的后面，because从句位于句首时要用逗号分开，放在句末时，可不用逗号分开。because表示直接原因，语气最强，最适合回答 why 引导的疑问句。（because of 也表示原因，但它后面不接从句, 只能接名词, 代词或动名词。注意：because 和 so 不可同时出现在一个句子里。） 例：I do it because I like it. = I like it so I do it. We went by bus because it was cheaper. = It was cheaper so we went by bus. He can’t go to school because of his illness. 2.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”= now that )，较为正式，语气比 because 弱。 例：Since you are free today, you had better help me with my mathematics. Since you don't trust him, you should not employ him. Now (that) you are grown up, you should not rely on your parents. 3. as引导原因状语从句 表示附带说明的“双方已知的原因”，含有对比说明的意味，语气比since弱，较为正式，位置较为灵活(常放于主句之前)。 例：As it is raining, you’d better take a taxi. As you are tired, you had better rest. I went to bed early, as I was exhausted. 三、原因状语从句注意点： (1)as与since，一样表示双方都知道的原因，通常位于主句前，且均不可用于强调结构被强调。 (2)当表示直接的因果关系，回答why时，或有only, just, all, partly, not, but等副词修饰时，或用在强调结构中都只能用because。 (3)不要受汉语意思影响将表示“因为”的连词与表示“所以”的 so 连用。 课后习题 单选题 1.—Why do you like your history teacher? —_____ he is very friendly and kind to us. A.Because B.When C.But 2.—_____ you're Lisa's good friend, you should help her. —I see, Ms. Jones. I'll do my best. A.Before B.After C.Since 3.—Why are you late again, Jack? —I am sorry, Ms. Brown. I didn't catch the bus _____ the heavy rain. A.though B.because C.because of 4.—Why do you like movies? —_____ it's relaxing. A.Then B.So C.Because 5._____ we have half an hour to wait for the bus, let's go to the coffee shop to have a cup of coffee. A.Since B.Although C.Before 6.We didn't go to school yesterday _____ the bad weather. A.because B.because of C.until 7.I like dolphi