名词性从句--主语从句

名词性从句（一 ）
名 词 性 从 句
主 语 从 句
宾 语 从 句
同 位 语 从 句
表 语 从 句
主语从句
• 把两句话合并成一句话 1. Tom will win the tennis game. It seems impossible.
That Tom will win the tennis game
3. Is he a policeman? It is not clear.
Whether he is a policeman is not clear.
4.Is the film star happy? It is not clear.
Whether the film star is happy is not clear.
人们相信… 人们认为….
It + be + 过去分词 + that…
1. That his father has gone to Tianjin is said. It is said that his father has gone to Tianjin. 2. That ten persons died in the accident is reported.
主语
seems
possible.
连系动词
表语
主语从句
连系动词 That Tom will win the tennis game
seems
表语
possible.
主句
• 主语从句： 在主句中担当主语的是一个从句，这 个从句就叫主语从句。 • 引导词： 从属连词：that, whether • 关系代词：who, whom, what • which, whose • 关系副词：when, where, why
That your mother didn’t attend the party
yesterday is a pity. 6. Tom stole his classmate’s money. It is a fact.
That Tom stole his classmate’s money is a fact.
由that引导主语从句
例句： 把两句话合并成一句话 1. Light travels in straight lines. It is known to all.
That light travels in straight lines is known to all.
2. We should wash our hands before meals. It is necessary.
It is right that light travels in straight lines. That he got a gold medal is real. It is real that he got a gold medal.
把下列句子用it 做形式主语
1. That Tom will win the game is possible.
It is necessary that we must complete this work before 5 o’clcok.
第三种：形式主语It代替that 主语从句
It +不及物动词 +that …
1) That I met my Geography teacher in the street happened. It happened that I met my Geography teacher in the street .
由that引导主语从句
• 把两句话合并成一句话
7. There will be rainy tomorrow. It is possible. That there will be rainy tomorrow is possible.
8.Teenagers smoke. It is wrong. That teenagers smoke is wrong.
4. That my mother lost her new wallet is a pity.
It is a pity that my mother lost her new wallet. 5.That Marry married a blind man is a pity. It is a pity that Marry married a blind man. 6. That Marry told a lie to her head-teacher is a surprise. It is a surprise that Marry told a lie to her head-teacher.
is necessary. 4. Students say hello to their teachers. It is polite.
That students say hello to their teachers.
is polite.
由that引导主语从句
• 把两句话合并成一句话 5. Your mother didn’t attend the party yesterday. It is a pity.
It is possible that Tom will win the game. 2. That we should wash our hands before meals is necessary. It is necessary that we should wash our hands before meals. 3. That we must complete this work before 5 o’clcock is necessary.
由 whether （“是否”）引导的主语从句
• 在主语从句中只能用 此意义时不能用
whether （是否），
if 替换。
形式主语It代替that 主语从句
That we study English well is necessary.
It
is necessary that we study English well.
1.That John won a gold medal is a fact.
It is a fact that John won a gold medal. 2. That I missed the beginning of the film is a pity.
It is a pity that I missed the beginning of the film . 3. That we will go travelling is good news. It is good news that we will go travelling.
It + be + 过去分词 + that…
4. That it will rain tomorrow is believed It is believed that it will rain tomorrow. 5.That the waiter works hard is thought. It is thought that the waiter works hard. 6. That the American president will visit China is reported. It is reported that the American President will visit China.
由 whether （“是否”）引导的主语从句
1. Will he go abroad? It is not known.
Whether he will go abroad is not known.
2. Will it rain tomorrow? It is not known.
Whether it will rain tomorrow is not known.
2) That I picked a red wallet on the way to school happened.
It happened that I picked a red wallet on the way to school. 3) That the manager and the boss went travelling happened. It happened that the manager and the boss went travelling.
that 省略问题
That it will rain tomorrow is believed
that 放句首不能省略
It is believed
that it will rain tomorrow.
that 放在句尾不省略，但偶尔在口语中有省略的。
关系代词：
what which who whom等引导主语从句
形式主语
真正主语
第一种：
形式主语It代替that 主语从句
1. It is + 名词 + that 从句 It is a pity that… It is a shame that …
It is a fact that …. It is an honor that…. 等等
形式主语It代替that 主语从句
That we should wash our hands before meals
is necessary.
由that引导主语从句
• 把两句话合并成一句话 3. Every student should have a study plan. It is necessary.
That every student should have a study plan
第二种：形式主语It代替that 主语从句
It is + 形容词+ that…
• It is important that…
• It is necessary that…
• It is polite that…. • It is wrong that…等等
把两句话合并成一句话
例句 That light travels in straight lines is right
第四种:形式主语It代替that 主语从句 • It + be + 过去分词 + that…
• It is said that … 据说…..
• It is reported that
据报道…
众所周知….
• It is known to all that …. • It is believed that …. • It is thought that ….
例句 Whom did the boy help? She is an old woman.
Whom the boy helped is an old woman.
Where does he live? It is Beijing. Where he lives is Beijing.
关系代词：
whaΒιβλιοθήκη Baidu which who whom等引导主语从句
把两句话合并成一句话 1.What do their parents need? It is more experience. What their parents need is more experience.
2.Which doctors will be sent to Wenchuan? It has not been decided. Which doctors will be sent to Wenchuan hasn’t been decided.
It is reported that ten persons died in the accident.
3. That the earth was not round was believed in ancient times. It was believed in ancient times that the earth was not round.