一 什么是名詞從句
名詞或名詞短語主要充當(dāng)四種句子成分：主語、賓語、表語和同位語，于是便構(gòu)成了四種從句：主語從句、賓語從句、表語從句、同位語從句。
- 主語從句
eg：What I am reading:主語
What I am reading is interesting - 賓語從句
eg:the life on other planets:賓語
No one knows exactly the life on other planets：沒人能夠確切的知道外星人 - 表語從句
eg:what I like most among all subjects
English is what I like most among all subjects:英語是所有科目中我最喜歡的一門 - 同位語從句
eg:that love,not time heals all wounds
I love the saying that love , not time heals all wounds .我喜歡這句話：是愛而不是時間能夠治愈一切創(chuàng)傷
二 簡單句與主語從句
1. It is + 過去分詞 + that從句
- It's reported that...（據(jù)報道）
- It's believed that...（人們相信）
- It is generally thought that...（人們普遍認(rèn)為）
- It has been found that...（現(xiàn)已發(fā)現(xiàn)）
- It should be noted that...（應(yīng)該注意）
- It must be pointed out that...（必須指出）
2. It is + 形容詞 + that從句
- It is clear that...（顯然）
- It is likely that...（很可能）
- It is certain that...（可以相信）
- It is fortunate that...（幸運(yùn)的是）
- It is possible that...（很可能）
- It is natural that...（很自然）
- It is strange that...（奇怪的是）
- It is necessary that...（有必要）
3. It is + 名詞短語 + that從句
- It is a pity that...（可惜的是）
- It is good news that...（真是太好了）
- It is no wonder that...（難怪）
- It is an honor that...（真榮幸）
- It is my belief that...（我相信）
- It is fact that...（事實(shí)是）
- It is a good thing that...（真是件好事）
- It is a shame that...(遺憾的是）
- It is common knowledge that...（...是常識）
- It is a miracle that...（...是奇跡）
