Now more and more people are busy ____ (learn) about the Internet
🌟 彻底解析：为什么填 learning？
🔍 核心语法规则
固定搭配：be busy doing sth（忙于做某事）
- 此处必须用 动名词（-ing形式） 作宾语
- 例：
She is busy working on the project.
They were busy preparing for the exam.
错误答案分析
- 若填 to learn（不定式）❌：
be busy to do 是错误搭配，不符合英语表达习惯
- 若填 to learn（不定式）❌：
⚡ 高频考点总结
📚 类似用法的形容词/动词短语
| 表达 | 正确结构 | 例句 |
|---|---|---|
| be busy | be busy doing | He's busy cooking dinner. |
| be worth | be worth doing | The movie is worth watching. |
| have fun | have fun doing | We had fun playing games. |
📝 强化训练
- She spent the whole day ______ (clean) the house.
answer
cleaning
（花整天打扫房子 | 固定搭配：spend time doing）
- The book is worth ______ (read) twice.
answer
reading
（值得读两遍 | be worth + 动名词）
- They had difficulty ______ (find) the address.
answer
finding
（难以找到地址 | have difficulty doing）
💡 口诀记忆
"busy 后面跟 doing，worth/fun 同样行！"
仍有疑问欢迎随时提问！ 😊