高中英语人教版 (2019)必修 第一册Unit 5 Languages around the world课前预习课件ppt

这是一份高中英语人教版 (2019)必修 第一册Unit 5 Languages around the world课前预习课件ppt，共23页。PPT课件主要包含了原因状语从句，as引导原因状语从句，考点追击，基本用法，状语从句的省略，语法填空，invited，frightened，eating，to take等内容，欢迎下载使用。

教材原句： As China plays a greater rle in glbal affairs, an increasing number f internatinal students are beginning t appreciate China’ s culture and histry thrugh this amazing language.
句型分析：本句为复合句。句中含有as引导的原因状语从句。
概述：as引导原因状语从句，表示“因为，由于”，相当于 since，常用来表示已为人们所知或显而易见的原因或理由。
E.g. As it has rained, the air is cler.因为下过雨，所以空气比较凉爽。
常用在书面语中，表示多为对方已知的或稍加分析便可得知的原因。
语气最强，表示一种直接的原因，常用于回答疑问词why引导的疑问句。
E.g. Since yu are s sure f it, he’ ll believe yu.
E.g. He will succeed because he is careful.
归纳拓展：as引导其它从句
As children get lder, they becme mre and mre interested in the things arund them.随着年龄的增长，孩子们对周围的事物越来越感兴趣。
Yu must d everything as I d.你必须要照我做事的样子去做所有事。
I dn't speak English s/as well as he( speaks English).我讲英语没有他讲得那么好。
1. Child as he was, he knew what was the right thing t d.2. Try as he might, he failed in the exam.
单数可数名词做表语时要省略冠词
As we expected, he succeeded in passing the exam.正如我们所预料的那样，他成功通过了考试。
1. 由于支持的很少，罢工未获成功。___________________________, the strike was nt successful .2. 众所周知，中国发生了巨大的变化。 __________________，great changes have taken place in China. 3. 尽管他学习很努力，但几乎没取得什么进步。 ________________ ， he makes little prgress. .
用“as引导的从句” 完成句子。
As there was very little supprt
As is well knwn
Hard as he wrks
Sum up： as引导原因状语从句
教材原句： Add a prepsitin where necessary.
句型分析：本句为复合句。主句为祈使句，从句为状语从句的省略形式。
where (it is) necessary
概述：状语从句主谓成分的省略是英语语言在使用过程中出现的一种较普遍的现象，它能使语言言简意赅。
1. Althugh wrking very hard, he failed in the final exam. (Althugh he wrked very hard,…)2. After taking the medicine, she felt much better. (After she tk the medicine,…)
1、连词+形容词/名词/介词短语Whenever (she is) free, she ften ges shpping. While (he was) a yung by, he was always ready t help thers.She lked anxius as thugh (she was) in truble.
2、连词+现在分词/过去分词/不定式While (she was) walking alng the river bank, she was singing a pp sng.If (it is) well read, the bk will give yu much t think.He std up as if (he were) t say smething.
If (it is) pssible, he will help yu ut f the difficulty.如果可能的话,他会帮你摆脱困境。
He wn't g there with us unless _____________ (invite).Althugh ________________ (fright), he managed t ran away.Granny tld the children nt t talk while _______________ (eat).He wuldn't slve the prblem even if _____________ (take) charge.
Sum up： 状语从句的省略
从句的主语与主句的主语一致
从句的主语和主句的主语一致，若从句的谓语动词是系动词时
从句的主语是it, 且谓语动词是be