非谓语是英语语法中的重要概念，包括动名词、不定式和分词。动名词是动词加-ing形式，不定式是动词加to形式，分词包括现在分词和过去分词。这些非谓语形式可以修饰名词、代词、副词或整个句子，对理解和使用英语语言非常有帮助。
动名词是动词加上-ing形式，它可以作主语、宾语、表语、定语或介词宾语。例如：
- Swimming is my favorite sport.
- I enjoy reading books.
- His job is teaching English.
不定式是动词加上to形式，它可以作主语、宾语、表语、定语或介词宾语。例如：
- To travel around the world is my dream.
- I want to learn how to play the guitar.
- The best way to learn English is to practice every day.
分词有两种形式，分别是现在分词和过去分词。现在分词是动词加上-ing形式，过去分词是动词加上-ed或不规则变化形式。分词可以作定语、表语或状语。例如：
- The children playing in the park are having fun.
- The book written by J.K. Rowling is very popular.
- Exhausted from work, she fell asleep on the couch.
