【什么是非谓语动词】在英语学习中，非谓语动词是一个非常重要的语法知识点。它指的是在句子中不作谓语的动词形式，通常用来表示动作、状态或与主句之间的逻辑关系。非谓语动词主要包括不定式（to do）、动名词（doing）和分词（done 或 doing）。它们在句子中可以充当主语、宾语、定语、状语、补语等成分。
为了更清晰地理解非谓语动词，以下是对它们的总结和对比：
非谓语动词总结
| 类型 | 形式 | 功能说明 | 举例 |
| 不定式 | to + 动词原形 | 表示目的、意图、将来动作；可作主语、宾语、表语、定语、状语等 | I want to go. He asked to leave. |
| 动名词 | 动词+ing | 相当于名词，可作主语、宾语、表语等 | Swimming is fun. She enjoys reading. |
| 现在分词 | 动词+ing | 表示正在进行的动作，常作定语、状语、补语等 | The man running is my teacher. I saw her working. |
| 过去分词 | 动词+ed / 不规则变化 | 表示被动或完成的状态，常作定语、状语、补语等 | The book written by him is popular. She was asked to come. |
非谓语动词的常见用法
1. 不定式：
- 作主语：To learn English is important.
- 作宾语：She wants to study abroad.
- 作目的状语：He went to the store to buy some food.
2. 动名词：
- 作主语：Reading is a good habit.
- 作宾语：I enjoy swimming.
- 作表语：Her hobby is painting.
3. 现在分词：
- 作定语：The singing bird is beautiful.
- 作状语：Seeing the problem, he decided to help.
- 作宾语补足语：I saw him playing football.
4. 过去分词：
- 作定语：The broken glass needs to be cleaned.
- 作状语：Given more time, we could have done better.
- 作宾语补足语：They found the door locked.
总结
非谓语动词是英语中非常灵活的语法结构，它们能够使语言表达更加简洁和自然。掌握非谓语动词的用法，不仅有助于提高阅读理解能力，还能增强写作表达的多样性。通过不断练习和积累，可以更好地理解和运用这些语法点。
