第15讲 原因状语从句-八年级译林版英语重难点精讲及专项训练（含解析）

八年级英语精品课及练习 第15讲 原因状语从句 第一部分 语法 原因状语从句 在复合句中，做原因状语的从句称为原因状语从句，可置于句首或句来。原因状语从句的引导词及用法的下所示: 常用引导词:because (因为) since (既然) as (因为) 用法 1、 because 表示造成某种情况的直接原因，引导的原因状语从句通常置于句来，语气最强 I didn't go surfing because it was too cold.我没有去冲浪，因为天气太冷了。 I can't go hiking with you because I have to help my mom with housework.我不能和你一起去远足，因为我得帮妈妈做家务。( 2、 since 表示已知或显然的原因，侧重强调主句内容，引导的原因状语从句通常置于句首，语气比because弱。 Since he was busy, he didn't come.因为他很忙，所以没来。 Since stress can make us sick, we have to learn how to deal with it.我们必须学会如何应对压力，因为它会使我们生病。 3、 as 表示对结果的附加说明，引导的原因状语从句通常置于句首或句末，语气比because和since弱。As the car was expensive, 1 we didn't buy it.因为这辆车很贵，所以我们就没有买它。 As it is often cold 1 in the mountains, 1 you need to wear warm clothes.由于山里经常很冷，所以你需要穿保暖的衣服。 注意： 1、for引出的句子也可以表示原因，但不是状语从句，而是并列句，因为for是并列连词。 We listened eagerly,for he brought news of our family. 2、because和so不能同时出现在同一个句子里面。因为because是从属连词，而so是并列连词。 第二部分 原因状语从句专项训练（含解析） 一、单项选择 1．I didn’t go to the party not _____ the cold weather but _____ I didn’t feel well. A．because of; because B．because; because of C．because；because D．because of; because of 2．一What shall we do now 一 _____ it's raining hard, let's stay at home. A．So B．Since C．However D．Otherwise 3．Tom isn't feeling very well. He seems to have a cold _____ the weather changes suddenly. A．before B．so C．because D．because of 4．-- _____ the sky is still blue, let’s go birdwatching together. --But the weather report says it is going to rain. A．Since B．When C．After D．While 5．The mother was worried_____the baby kept_____. A．because; crying B．because of; to cry C．because of; crying D．because; cried 6．The mother was worried _____ her baby kept _____. A．because ; crying B．so ; to cry C．because of ; crying D．if ; cried 7．_____ he can't answer the question, you'd better ask someone else. A．Before B．So C．Since D．until 8．_____you live in one house with friends, you should share the housework. A．Since B．Unless C．Though D．So 9．_____ this is your first visit to New York, you'd better learn some of the customs. A．Unless B．Until C．Since D．Although 10．As Tom is a brave boy, he knows how to stay calm when there is danger. Which word can replace (代替) “As” here A．So B．Since C．Until D．If 11．_____ there was a lot of fog in the morning _____ I was late for school. A．Because, so B．Because, / C．Because, but D．So, because 12．--Is Tom at school today --No, he’s at home _____ he has a bad cold. A．because B．if C．until D．before 13．— I won’t attend the meeting _____ him, _____ I have too much to do these days. — I s ... ...