a) It is a pity that you didn’t go to see the film. 你不去看那场电影真可惜。
　　b) It doesn’t interest me whether you succeed or not.　我对你成功与否不感兴趣。
　　c) It is in the morning that the murder took place.　谋杀案是在早上发生的。(强调句型)
　　d) It is John that broke the window.　是John打碎的窗户。(强调句型)

　　2. 用it 作形式主语的结构
　　(1) It is + 名词 + 从句
　　It is a fact that … 事实是…
　　It is an honor that …非常荣幸
　　It is common knowledge that …是常识

威武。。。继续。我就是英语差。撒都不会

　　(2) It is + 形容词 + 从句
　　It is natural that… 很自然…
　　It is strange that… 奇怪的是…
　　(3) It is + 不及物动词 + 从句
　　It seems that… 似乎…
　　It happened that… 碰巧…
　　It appears that… 似乎…

　　(4) It + 过去分词 + 从句
　　It is reported that… 据报道…
　　It has been proved that… 已证实…
　　It is said that… 据说…

我会坚持下去的。一百天后，我不想后悔

求更新啊！不错哦，我挺你！！！

　　3. 主语从句不可位于句首的五种情况：
　　(1)if 引导的主语从句不可居于复合句句首。
　　(2)It is said /reported…结构中的主语从句不可提前。例如：
　　正确表达：It is said that President Jiang will visit our school next week.
　　错误表达：That President Jiang will visit our school next week is said.

　　(3)It happens/occurs…结构中的主语从句不可提前。例如：
　　正确表达：It occurred to him that he failed in the examination.
　　错误表达：That he failed in the examination occurred to him.
　　(4)It doesn’t matter how/whether …结构中的主语从句不可提前。例如：
　　正确表达：It doesn’t matter whether he is wrong or not.
　　错误表达：Whether he is wrong or not doesn’t matter.

　　(5)含主语从句的复合句是疑问句时，主语从句不可提前。例如：
　　正确表达：Is it likely that it will rain in the evening?
　　错误表达：Is that will rain in the evening likely?

为了下午好好考试。我决定先休息会。午安

理综，啊啊，最害怕的一科来了！呜呜呜。不要让我死的太惨。

大水逼，你能不能不要在水了？

　　4. what 与that 在引导主语从句时的区别
　　what 引导主语从句时在句时在从句中充当句子成分，如主语.宾语.表语，而that 则不然。例如：
　　a) What you said yesterday is right.
　　b) That she is still alive is a consolation