名词性从句是英语语法的重要部分，可以在句子中充当名词的角色。常见的例子包括"That he is a genius is well-known"，"I believe what he said"，"She is worried about whether she can pass the exam"，"He asked me where I was going"和"My hope is that I can travel around the world"。理解和掌握这些例句对英语学习者非常重要。
- That he is a genius is well-known.
这个句子中，名词性从句"That he is a genius"作为主语，引导词是"That"。整个句子的意思是："他是天才这一点是众所周知的。"
- I believe what he said.
这个句子中，名词性从句"What he said"作为宾语，引导词是"What"。整个句子的意思是："我相信他所说的话。"
- She is worried about whether she can pass the exam.
这个句子中，名词性从句"Whether she can pass the exam"作为介词"about"的宾语，引导词是"Whether"。整个句子的意思是："她担心她是否能通过考试。"
- He asked me where I was going.
这个句子中，名词性从句"Where I was going"作为动词"asked"的宾语，引导词是"Where"。整个句子的意思是："他问我我要去哪里。"
- My hope is that I can travel around the world.
这个句子中，名词性从句"That I can travel around the world"作为主语，引导词是"That"。整个句子的意思是："我的希望是能够环游世界。"
