【it做形式主语的句型你知道吗?】在英语学习中，"it" 作为形式主语的用法是一个非常常见的知识点。虽然它本身没有实际意义，但在句子中起到引导作用，使句子结构更清晰、表达更自然。掌握这一句型不仅有助于提高语法水平，还能增强写作和口语表达能力。
以下是对“it”作形式主语的常见句型进行总结，并附上表格以便快速查阅和理解。
一、常见句型总结
1. It is + 形容词/名词 + that 从句
- 表达某事是“重要的”、“有趣的”、“令人惊讶的”等。
- 例句：It is important that he should come on time.（他准时来很重要。）
2. It is + 过去分词 + that 从句
- 表示某事被“认为”、“据说”、“被要求”等。
- 例句：It is said that she has left the country.（据说她已经离开了这个国家。）
3. It is + 时间/地点 + that 从句
- 强调时间或地点。
- 例句：It was in 2010 that he moved to Beijing.（他是在2010年搬到北京的。）
4. It is + 名词 + to do sth
- 表示做某事是……
- 例句：It is a pleasure to meet you.（见到你真高兴。）
5. It is + 形容词 + for sb to do sth
- 表示对某人来说做某事是……
- 例句：It is difficult for him to understand the problem.（对他来说理解这个问题很难。）
6. It is + 形容词 + of sb to do sth
- 强调某人的行为或品质。
- 例句：It is kind of you to help me.（你帮助我真是太好了。）
7. It seems/appears that...
- 表示“看起来……”
- 例句：It seems that he is not coming.（看起来他不会来了。）
8. It happens that...
- 表示“碰巧……”
- 例句：It happened that I met my old friend yesterday.（碰巧昨天我遇到了老朋友。）
二、表格对比总结
| 句型结构 | 说明 | 例句 |
| It is + 形容词/名词 + that 从句 | 表达某种观点或评价 | It is important that he comes early. |
| It is + 过去分词 + that 从句 | 表示传闻、公认的事实 | It is believed that he is innocent. |
| It is + 时间/地点 + that 从句 | 强调时间或地点 | It was at the meeting that we decided to change the plan. |
| It is + 名词 + to do sth | 表示做某事是…… | It is a shame to miss the opportunity. |
| It is + 形容词 + for sb to do sth | 对某人来说做某事是…… | It is easy for us to solve this problem. |
| It is + 形容词 + of sb to do sth | 强调某人的品质或行为 | It is brave of her to speak out. |
| It seems/appears that... | 表示“看起来……” | It seems that the weather will improve. |
| It happens that... | 表示“碰巧……” | It happened that I had no money on me. |
三、小结
“it”作为形式主语的句型在英语中使用广泛，尤其在正式或书面语中更为常见。掌握这些句型不仅能提升语言表达的准确性，还能让句子更加地道、自然。建议通过多读多练来巩固这些用法，同时注意区分不同句型之间的细微差别，避免混淆。
如果你还在为“it”作形式主语的用法而困惑，不妨从以上句型开始练习，逐步掌握其运用技巧。