(
课件网) Unit 7 Module 4 Discovery Period 4 Grammar The unknown world Adverbial clauses of reason ＆because of Objectives To know the usage of adverbial clauses of reason ＆because of To learn to use them 1. He distrusted me because I was new. 2. As all the seats were full he stood up. 3. The country is not strong because it is large. 4. Since /As we’ve no money, we can’t buy it. 5. I am going to North Country Park because I want to go cycling. 6. Because no one else saw these aliens, I refuse to believe you. 7. As I like cycling, I am going to North Country Park. 8. Tim didn’t go to school yesterday because of his illness. 9. Tim didn’t go to school yesterday because he was ill. Have a look 知识脉络 原因状语从句 引导词 用法 Because of 句型 状语修饰动词、形容词、副词或整个句子。当状语为句子时即为状语从句，一般可以用来表示时间、地点、原因、结果等概念。 Adverbial clauses of reason Conjunctions： because , since , as , for , now that because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 fed up. (2)回答why提出的问题，只能用because, 不能用其余三者。 A：Why can’t I go B：Because you are too young. 关于because (3)because引导的从句可用于强调句，其余不能。 如：It’s because he is kind that we like him. (4)because从句可用作表语，其余不能。 如：This is because the earth is traveling around the sun. (5)表示“……的原因是因为……”这一意义时，一般要用The reason why…is that… 如：The reason why he cannot come is that he is ill. 关于because 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。 例如： Since you are free today, you had better help me with my mathematics. 既然今天你休息， 你最好帮我补习数学。 since可用于省略句，而其它不能。如： Since so, there is no more to be said. 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)。 例如： As it is raining, you’d better take a taxi. 既然在下雨， 你最好乘出租汽车。 I went to bed early, as I was exhausted. 我睡得早， 因为我筋疲力尽了。 关于as (1)for是并列连词(其他为从属连词)，它有时可表示因果关系(只能放在主句之后)是对前面分句的内容加以解释。如： It rained last night, for the ground is wet this morning. (2)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.是用来附带解释或说明前一分句的原因和理由。例如： Day breaks, for the bird sings. 关于for now that用来说明一种新情况，然后加以推论。 Now that you are ready, we'll start at once. 既然你已经准备好了，我们马上开始。 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。 关于now that ［例题1］ ____ you’ve got a chance, you might as well make full use of it. A. Now that B. After C. Although D. As soon as ［答案］ A ［解析］ 主句与从句之间存在因果关系， 且“you’ve got a chance”表示一个显而易见的原因， 因此应选用表原因的now th ... ...
