Unit 5 语法Grammar 原因状语从句-2023-2024学年九年级英语上册单元语法精讲精练（牛津译林版）

班级 姓名 学号 分数 Unit 5 Art world 原因状语从句 （时间：60分钟，满分：80分） 原因状语从句 原因状语从句通常由because, since, as引导。 一、 because 1. because引导的从句表示直接原因，语气最强。because引导的原因状语从句常位于主句之后，但也可放在主句之前，并用逗号隔开。 I am tired because I didn’t sleep well last night. Because I didn’t finish my homework, I was punished. 2.回答由why提出的问题，只能用because而不能用since，as。 —Why is Serina crying? —Because her father had an accident. 3.because不能与并列连词so同时在句中使用。 She was late for school because she missed the bus. = She missed the bus, so she was late for school. 4. because和because of 有明显的区别。because后面要跟从句，而because of 后跟名词、代词或动名词等。 He is late for school because it rains heavily. = He is late for school because of the heavy rain. 二、 since / as 1．since引导原因状语从句时，表示显然的或已为人所知的理由，常译为“因为”“既然”，语气比because稍弱，多置于句首，较正式。 Since time is up, let’s have a break. 2．as表示附带说明的“双方已知的原因”，含义与since相同，但语气更弱，没有since正式。 As no classmates were there, I got back soon. 【特别提醒】 since conj./prep意为“自从...起”，引导时间状语时，主句用现完； as的其他意思：conj. 当......时，随着；因为；正如; prep. 作为。 三、for for作为并列连词，也有“因为”之意，它用于引导原因状语从句时不位于句首，引导 分句并不说明前句行为发生的直接原因，只是对前面的内容加以说明、解释或推断。 There must be no one in the house for the door is closed.（推断） 1、 单项选择(本大题共50小题，每小题2分，共100分) 1．________ you know little about this art form, you can find a book to learn. A．Though B．While C．When D．Since 2．Many people were dying ________ they did not get to hospital quickly enough. A．so that B．because C．although D．so 3．He didn’t go to school ________ he was ill. A．so B．because C．or D．so that 4．I didn’t go to school yesterday ________ I had a terrible toothache. A．because B．but C．so D．or 5．Everyone wants to make friends with Andy, ________ he is very friendly. A．but B．because C．so D．or 6．I always get up early on weekdays ________ I’m afraid I will be late for school. A．though B．because of C．so D．because 7．History is my favorite subject ________ it’s very interesting. A．if B．though C．when D．because 8．________ you can’t work out the problem, perhaps you need to ask your classmates for h