内容正文:
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
本单元按照课文要求须掌握的语法点是“主语从句”。
一、主语从句的基本形式
在主从复合句中,充当主语的从句叫主语从句。如:
What he did in the earthquake moved everyone. 他在地震中的行为感动了每一个人。
That the president of Poland died in an air crash is a fact. 波兰总统在坠机事故中遇难是事实。
二、主语从句的用法
1. 引导主语从句的连接词
① 从属连词:that,whether
※ that在从句中不充当句子成分,也无词义,但不可省略。如:
That China will become more powerful is certain. 中国将变得更强大是确定无疑的。
That she became a famous writer made her parents very happy.
她成了一名知名作家,这使她的父母非常高兴。
※ whether在句中不充当句子成分,意为“是否”。如:
Whether life exists on other planets is not clear. 其他星球上是否存在生命还不清楚。
Whether we go there by train or by air makes no difference. 我们乘火车还是乘飞机去那儿没什么差别。
Whether we will go for an outing tomorrow remains unknown. 明天我们是否去郊游还不清楚。
② 连接代词:what,who,whom,whose,which,whatever,whoever,whichever它们在从句中充当主语、宾
语、表语或定语。如:
Who will host the meeting has not been decided yet. 谁来主持会议还没有决定。
Whose car runs faster should be tested. 应该测试谁的车跑得更快。
Which plan is better should be discussed. 应该讨论哪一个计划更好。
Whoever comes to China is welcome. 无论谁来中国都受欢迎。
Whatever you do should do no harm to others. 无论你做什么都不应该伤害别人。
③ 连接副词:when,where,why,how有词义,在从句中做状语,分别表示时间、地点、原因和方式。如:
When and where we will set up the factory hasn’t been decided.
我们何时何地建立工厂还没有决定呢。
Why the singer committed suicide has not been cleared yet. 那位歌手为何自杀还不清楚。
How this happened is not clear to anyone. 这件事情是怎样发生的还不清楚。
2. it做形式主语
由于主语从句太长,为了避免头重脚轻,常常用 it做形式主语,而把主语从句放在句末。常用的主要有
Unit 5 Working the land
【主题:农业】
选
必
修1
1
17
跟着课本学语法
学习效果事半功倍
以下五种句型:
① It+ be+形容词(clear,obvious,true,nature,surprising,good,wonderful,funny,possible,likely,probable,
certain,uncertain,fortunate,etc.)+that...
It is probable that he has known everything. 很可能他什么都已经知道了。
It is clear that the girl told a lie. 很明显那个女孩说了谎。
It is certain that free medical care will be given to most people in our city.
我们城市的多数人将享受免费医疗,这是一定的。
② It+ be +名词(词组)(a pity,no wonder,an honor,a good idea,a fact,good news,a shame,a surprise,
common knowledge,etc.)+that...
It is a pity that your parents don’t permit you to