名词性从句是英语语法中的重要概念，特别是宾语从句，常作为主句的动词或介词的宾语。例句包括"I don't know what he wants to do."和"She asked if/whether he would come to the party."等。掌握名词性从句的用法和例句对学习英语语法和提高英语水平有很大帮助。
- I don't know what he wants to do. （我不知道他想干什么。）
- Can you tell me where the library is located?（你能告诉我图书馆在哪里吗？）
- She asked if/whether he would come to the party.（她问他是否会来参加派对。）
- The teacher explained how to solve the math problem.（老师解释了如何解决这个数学问题。）
- He is wondering when they will arrive.（他在想他们什么时候到达。）
- I heard that they got married last week.（我听说他们上周结婚了。）
- She doesn't know why he is angry with her.（她不知道他为什么生她的气。）
