内容正文:
跟着课本学语法
学习效果事半功倍
本单元按照教学要求须掌握的语法点是“表语从句”。
一、表语从句的连接词(见表)
二、表语从句的用法
1. as if / as though引导的表语从句通常位于连系动词 look,seem,feel等之后,从句有陈述和虚拟两种语
气。若所表达的意思是真实的,就用陈述语气;若表述与客观事实相反的假设,则用虚拟语气。如:
It looks as if he benefits a lot from the project. 看起来他好像从这个项目中获益不少。(陈述语气)
It looks as if / though it would rain. 看起来像是要下雨。(虚拟语气)
It seems as if it were / was spring already. 似乎已经是春天了。
2. that,why,because引导的表语从句的区别
① 表述原因的名词(reason,cause)做句子主语时,其后的表语从句常用 that引导,不可用because,即构
成句式:the reason / cause is that...。如:
The reason why he was late was that he missed the first bus this morning.
他迟到的原因是他今天早上没赶上第一班公共汽车。
Part of the reason is that those future generations have already been watching him and taking inspiration from
his example. 部分原因是,未来的几代人已经看过他的比赛,并从他的故事中受到鼓舞。
② because引导的表语从句常用于That’s because...结构中,说明产生上述结果的原因;That’s why...结
Unit 1 Science and scientists
【主题:科学与科学家】
选
必
修1
2
类 别
从属连词
连接代词
连接副词
其他连接词
连 词
that和whether。that在从句中不做
成分,也没有意义,不可省略;
whether在从句中不做成分,但有“是
否”的意思,通常不用 if代替。
what,who,whom,whose,which,
whatever,whoever,whichever等。在
从句中做主语、宾语、表语或定语。
when,where,why,how,whenever,
wherever,however等。在从句中做
状语。
because, as if, as though等。
例 句
The reason for your mistake is that you lack confidence in
yourself. 你犯错的原因是你对自己缺乏信心。
The question is whether we can reduce the cost of the
product. 问题是我们能否降低产品成本。
This is what we want to do. 这就是我们想做的。
China is no longer what she used to be. 中国不再是以前
的样子了。
Their difficulty is where they can raise enough money.
他们的困难是他们到哪里可以筹到足够的钱。
The question is how we can persuade him to go with me.
问题是我们如何才能说服他和我一起去。
That was because he didn‘t understand me.
那是因为他不理解我(的话)。
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人教2019版高中英语(选择性必修一、二、三、四册)
精准定位课文语法点
构中,why引导的名词性从句说明由上述原因导致的某种结果。如:
I was late for school this morning. That’s because I stayed up too late last night.
今天早上我上学迟到了,那是因为我昨晚熬夜太晚。(果→因)
I stayed up too late last night. That’s why I was late for school this morning.
我昨晚熬夜太晚,那就是我今天早上上学迟到的原因。(因→果)
3. 主语是表示“建议、命令、要求(proposal,suggestion,command,order,advice,demand,requirement,
request)”等的名词时,表语从句应用虚拟语气,即