专题05 句型知识梳理二:Unit 4-Unit 7(原卷版)-2022-2023学年八年级英语上学期期末考点大串讲(牛津上海版)

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专题 05 句型知识梳理二:Unit4-Unit7
Unit4: Key sentence structure
1...because it made it easier to write big numbers and to calculate.……因为它(0)使得大数字
的书写和计算更加容易。
(1) because conj.因为
e.g. I was angry because he was late. 因为他迟到了,所以我生气。
【指点迷津】because, since, as, for
都是表示“原因”的连词。以上连词的语气由强至弱依次为 because since as for; 其中
becausesinceas 为从属连词,引导原因状语从句; for 为并列连词,连接两个并列句。
Because“因为",表示直接原因,回答 why 的提问,一般放在主句之后,可单独存在。
e.g. -Why don't you buy it? 为什么你不买它?
-Because I don't have enough money with me.因为我没有带足够的钱。
We stayed at home because it rained.下雨了,所以我们待在家里。
since “因为,既然”,侧重主句,从句表示显然的或已知的理由。
e.g. Since everyone is herelet's begin. 既然大家都到齐了,我们开始吧。
as“由于,鉴于”,主从句并重,从句说明原因,主句说明结果,为常用词。
e.g. As it was lateI must hurry up.由于晚了,我得快点。
for“因为,由于”,表明附加或推断的理由,其前常有逗号,for 及其后的句子不放在
句首。
e.g. He must be illfor he isn't here today.他一定是病了,因为今天他没来。
【友示】“因…所”的汉不: because so although but 法相
都不可连在一起使用,只能用其中一个,这一点和汉语不同,使用时一定要注意两种语言的
不同习惯。
因为他病了,所以他没来上学。
[]Because he was ill, so he didn't come to school.
[]Because he was ill, he didn't come to school.
[]He was ill, so he didn't come to school.
(2) make it+adj. + to do sth.使得做某事变得……
e.g. The electronic dictionary makes it quicker to look up a new word.
电子词典使我们查阅生词更迅速。
2Abacuses are so fast and accurate that people still use them today.算盘(计算起来)是如此的
快速和精确,因此人们至今还在使用它们。
so…that…“如此……以至于”,引导结果状语从句,so 后接形容词或副词,that 后面接从
句。
e.g. The box is so heavy that I can't carry it.这个箱子如此的重以至于我抬不动它。
He runs so fast that his classmates can't catch up with him.
他跑得如此快以至于他的同学都赶不上他。
【友情提示】当 that 后面的从句为否定句时,可以用 too…to 改写为简单句,当 that 后面的从
句为肯定甸时,可以用 enough to 改写为简单句。
e.g. He is so young that he can't go to school.
=He is too young to go to school.他太小了,还不能去上学。
He is so tall that he can reach the apples on the tree.
=He is tall enough to reach the apples on the tree.他很高能够得到树上的苹果。
so 后面有单数名词时可用 such ...that…进行改写。
e.g. He is so tall a man that he can almost reach the ceiling.
=He is such a tall man that he can almost reach the ceiling.他个子这么高,几乎够得着天花
板。
【知识拓展】 so that 的用法
(1) so that 以便; 目的是。引导目的状语从句
e.g. Our teacher spoke loudly so that everyone could hear him. 我们的老师大声讲课以便每个
人都能听到。
So that 常与 maycan 等词连用,从句前无逗号。
e.g. I hired a boat so that I could go fishing. 我租了一条船,为的是可以去钓鱼。
He worked hard in order that/so that he could succeed.
=He worked hard in order to/so as to succeed. 他努力工作,为的是成功。
(2) so that 还可引导结果状语从句,从句前可用逗号与主句隔开,意为“因为”。
e.g. The bus broke down, so that we had to walk. 公共汽车抛锚了,因此我们必须步行。
专题05 句型知识梳理二:Unit 4-Unit 7(原卷版)-2022-2023学年八年级英语上学期期末考点大串讲(牛津上海版).docx

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