Unit 7 The unknown world 原因状语从句 （时间：40分钟，满分：100分） 在中考英语中，原因状语从句（Causal Adverbial Clause）是一种从属于主句的从句，用来说明主句发生的原因或理由。原因状语从句通常由引导词引导，例如“because”、“since”、“as”等。 原因状语从句可以回答主句中的“why”问题，帮助我们理解主句的原因或动机。它们提供了更多的信息，使句子更加完整和准确。原因状语从句与主句之间存在一种因果关系，主句的发生或行为是由从句中描述的原因或理由所引起的。 一、because用法 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。 Eg: Because it was raining, we stayed at home. They are happy because he won the game. 二、because不能与so连用 Eg: Because it was raining, we stayed at home. It was raining, so we stayed at home. 三、because从句与 because of短语的转换: because+ 句子 because of +短语 Eg: He can’t come because he is ill. / He can’t come because of his illness. 四、because引导的从句用 why提问。 例句： Why you choose this sport I do it because I like it 五、because/ since(因为；既然) / as（因为） Eg: Since he has said sorry to you, let it go. As he was not well, I decided to go alone 一、单项选择(本大题共50小题，每小题2分，共100分) 1．Bob thinks Nanning is his second hometown _____ he has lived there for many years. A．but B．because C．though 2．I like watching CCTV News _____ they can help me learn more about the world. A．because B．though C．until D．till 3． ─ What shall we do to kill time ─ Well, _____ it is Wanda Cinema’s half-price day, why not go to watch a film A．since B．whether C．although D．until 4．—Why do you like the book Father and Son —_____ it’s very interesting. A．Because B．So C．But D．And 5．I’d like to be a doctor _____ I want to help sick people. A．so B．but C．because D．if 6．Geography is Carl’s favorite subject, _____ it’s useful. A．because B．or C．but 7．We didn’t enjoy the trip at all _____ the weather was awful. A．although B．because C．unless 8．-- Why do you like P.E. -- _____ they’ re fun. A．And B．For C．Because D．But 9．—The local food looks a bit strange. —Well, _____ we are here, why not give it a try A．though B．unless C．since D．because 10．He was sad _____ he lost a game just now. A．because B．so C．but D．and 11．Haruki Murakami was awarded “Hans Christian Andersen Award” _____ he has made a lot of contributions to classical and popular culture. A．until B．if C．since D．when 12．Uncle Tetsu（彻思叔叔）cheese cakes sell well____they are so nice. A．because B．so C．but D．and 13．You are going to like the future _____ robots will do the heavy work. A．so B．because C．but 14．He didn’t go to the beach _____ the bad weather. A．because B．because of C．so 15．I was late for school, _____ there’s something wrong with my bike. A．but B．because C．or D．and 16．Zhao Haisheng likes lions _____ they are big and strong (强壮的). A．if B．so C．but D．because 17．Tom speaks English very well， he often practises _____ in English with ... ...
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