why/waɪ/

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➊ for what reason

➋ used to talk about a reason

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➊ [疑问副词] 为什么：Why do you like the movie? 为什么你喜欢这部电影？

◇Do you know why she's crying? 你知道她为什么在哭吗？

◇“I can't go now.” “Why not?” “我现在不能走。”“为什么不能？”

➋ [关系副词] …的原因：The reason why they succeeded is that they worked hard. 他们成功的原因就是他们工作勤奋。

Why don't you (或Why not) do sth [表示建议] 为什么不…：Why not come over for dinner? 为什么不过来吃饭？

Why not? [表示接受建议或邀请] 好呀，为什么不呢：“Let's go swimming.” “Why not?” “我们去游泳吧。”“好哇。”

音组-y/-aɪ/

by; my; shy; sky; spy; try; why

常犯错误

✗ “Tom got promoted.” “Why he?”

✓ “Tom got promoted.” “Why him?” “汤姆晋升了。”“为什么是他？”

[✌作主语的人称代词与not或why连用时，常用宾格]

常犯错误

✗ Why not to have a try?

✓ Why not have a try? 为什么不试一试？