Unit 5 Grammar课件 2023-2024学年牛津译林版九年级上册英语

Unit 5 Art world Grammar clauses of reason 原因状语从句是指在复合句中表示主句动作发生原因的句子。 We can give reasons with because, since and as. A. Giving reasons with because 1. We use because to introduce clauses of reason. Its tone is strong. because意为“因为”，表示动作发生的直接原因，语气很强。 2. We often use because to answer why questions. because可以用来回答why引导的疑问句。 3. We never use the conjunction so in sentences with because. 在一个英语句子中，so和because不能同时出现。 e.g. Because my bike was broken, I walked to school yesterday. ( ) Because my bike was broken, so I walked to school yesterday. ( ) Giving reasons with because √ × 4. because of也可表达直接的原因，后接名词、代词或动名词。一般可以和because引导的从句互换。 e.g. 1）由于生病，他缺课了。 He was absent from school _________ he was ill. = He was absent from school because of his illness. 2）因为割破了自己的手指，我开始哭。 I started to cry _________ I cut my finger. = I started to cry because of cutting my finger. because because 1. Why was Tan Dun chosen to write music for the Beijing Olympics? __________________________________________________________ 2. Why does Tan like the sounds of nature? __________________________________________________________ 3. Why is Tan able to build a bridge between the East and the West? __________________________________________________________ 4. Why do people think highly of Tan’s music? __________________________________________________________ Because he is a world-famous composer. Because he thinks the best music comes from nature. Because he has successfully brought Chinese and Western music together. Because he has created a new type of music—music without boundaries. Exercise: Questions about Tan Dun B. Giving reasons with since and as Since and as are also used to give reasons for something. Usually the reasons are already known. Their tone is weaker than because. 我们也可以用since和as引导原因状语从句。相对于because而言，since和as的语气较弱。 since意为“因为，既然”，表示已知的、显然的理由，较正式，多用于句首。 as和since的用法大体相同，表示附带说明的“双方已知的原因”。 e.g. Since it is late, I shall go hom