【it做形式主语19个句型】在英语语法中，"it" 作为形式主语是一种非常常见的用法。它主要用于将真正的主语（通常是动词不定式、动名词或从句）后置，使句子结构更加平衡和自然。掌握 "it" 做形式主语的句型，不仅有助于提升写作和口语表达的地道性，还能增强对复杂句子的理解能力。
以下是19个常见的“it”做形式主语的句型，涵盖了不同的语境和表达方式：
1. It is + 形容词 + that 从句
例句：It is important that we arrive on time.
2. It is + 名词 + that 从句
例句：It is a fact that he has passed the exam.
3. It is + 过去分词 + that 从句
例句：It is said that she will resign soon.
4. It is + 时间/地点 + that 从句
例句：It was in 2005 that he started his business.
5. It is + 介词短语 + that 从句
例句：It is by chance that I met him.
6. It is no wonder that...
例句：It is no wonder that he failed the test.
7. It is high time that...
例句：It is high time that we left.
8. It is (not) likely that...
例句：It is likely that the meeting will be postponed.
9. It is necessary that...
例句：It is necessary that you study hard.
10. It is possible that...
例句：It is possible that they will come tomorrow.
11. It is certain that...
例句：It is certain that the project will succeed.
12. It is strange that...
例句：It is strange that he didn’t answer the call.
13. It is a pity that...
例句：It is a pity that we couldn’t go to the concert.
14. It is no good / use doing sth.
例句：It is no use crying over spilled milk.
15. It is worth doing sth.
例句：It is worth visiting the museum.
16. It is time for sb. to do sth.
例句：It is time for us to go home.
17. It takes sb. some time to do sth.
例句：It took me an hour to finish the homework.
18. It is not until... that...
例句：It is not until 8 o’clock that he arrived.
19. It is no wonder that...
例句：It is no wonder that she is so tired after work.
这些句型在日常交流、书面表达以及考试中都非常重要。通过熟练掌握这些结构，可以更自然地表达自己的想法，同时也能提高语言的准确性和流利度。
总之，“it”做形式主语是英语学习中不可忽视的一部分，理解并灵活运用这些句型，将大大提升你的英语水平。
