英语必修三--名词性从句-课件讲解学习

It is believed that…
人们相信…
It is known to us/all that …. 众所周知…
It has been decided that…… 已经决定……
It + be + 名词 ＋ that从句
It is common knowledge that… …是常识
It is a surprise that ….
That/wh-clause + v +…主语从句 S +be/link.v + that/wh-clause表语从句 S + vt + that/wh-clause宾语从句 S + vi + prep + wh-clause宾语从句
断句方法同定语从句：
1. 含有关系词的： 始——关系词 末——第二个谓语动词之前
What Ihte said was none of your business.
It(形式主语)......+that/whether/wh-... It is undoubted.that Taiwan belongs to China. It is a question.whether Hhee should get married. It is not a big deal.who takes the
2. 不含关系词的： 始——（句中）主谓结构 末——第二个谓语动词之前
名词性从句
主语+be+表语
名词
主语+do+宾语
名词
名词性从句
主语从句
宾语从句 表语从句 同位语从句
主语从句在句中做-----主- 语 宾语从句在句中做----宾--语
表语从句在句中做------ 表语 同位语从句在句中--同---位
那孩子考试又不及格令他母亲很失望. (从句作主语)
同样作主语，从句可以表示较复杂的含义,一般是个动作或性质
I know him. I know that he is writing his composition in his room
我知道他在房间里写作文.
从句的特征:
是一个句子,有一个引导词,引导词做从句的一个成分 (that 除外)
一 that不作成分, 无翻译，但不能省 It is unfair. Women are treated unequally in some areas. That women are treated unequally in some areas is unfair. It is undoubted. Taiwan belongs to China. That Taiwan belongs to China is undoubted.
句中做主、表、宾、定成分)
副词
when-时间,where-地点,why-原因,how-方式…(在从
句中做状语)
注意：所有句子均为陈述语序
学习目标：
1. 掌握主语从句的基本概念； 2. 能从句中找出主语从句； 3. 能够概括出主语从句的引导词；学会根
据句意选择恰当从句叫做主语从句。
主语从句
that, whether， wh-词 ➢在从句中不作成分:
that，if，whether “是否” ➢在从句中作成分:
what/who/whom/ which
whatever/ whoever/ whichever
where/when/why/ how 注意：which表示有明确范围的选择
if, whether “是否”
Whether/if不作成分，if不能位于句首, It is a question. He should get married. Whether he should get married is a question.
wh-词作成分, 引导陈述语序 连接代词：what, who 连接副词：when, where, why, how
同位语从句
1. 为什么叫名词性从句？ 名词能做的成分,从句都能 2整. 个__从__句__相__当_于__一__个__名__词______ 做 2. 为什么要有名词性从句？ 从句表达的意思比名词复杂得多
比较: The man looked around. 那人看了看四周. (名词作主语) That the boy failed again in the exam disappointed his mother.
• It is necessary (important, natural, strange, etc.) that …
that
whether if
主语 从句
不能省 句首 whether
宾语从句 动宾 介宾 可省 禁用
whether 只能 or not whether
表语 从句
不能省 只能 whether
同位语从 句
不能省
只能 whether
代词
what-物, whatever, who/whom-人, whoever… (在从
first step.
用it形式主语的that从句有以下四种
不同的搭配：
It + be + 形容词 ＋ that从句
It is necessary that… It is important that …. It is obvious that……
有必要… 重要的是… 很明显……
It + be + -ed分词 ＋ that从句
1. That he will come is certain.
语
主语从句
2. I know that he will come.
宾语从句
3. The truth is that I have been there.
表语从句 4. The fact that she was late surprised us.
令人惊奇的是…
It is a fact that……
事实是……
It + 不及物动词 ＋ that从句
It appears that…
似乎…
It happens that ….
碰巧…
It occurred to me that…… 我突然想起……
• 另注意在主语从句中用来表示惊奇、 不相信、惋惜、理应如此等语气时， 谓语动词要用 虚拟语气 “(should) +do”，常用的句型有：