I. EXAMPLES: Why not try to persuade him to give up smoking? 为什么不试着劝他戒烟呢？ Why don’t you go ask the teacher? 你为什么不直接去问问老师呢？ Why not buy some ready-made food? 为什么不买些现成的食物呢？ A: Let’s go to see a film tonight. A: 我们今晚去看电影吧？ B: Sure, why not? B: 好啊，为什么不呢？ II. DIALOGUES: Teacher: I'd like you to introduce the guest speaker at the student assembly today. 老师: 我希望你能在今天的学生成会上介绍特邀演讲嘉宾。 Student: Why me? I can’t do that. 学生: 为什么是我？我做不到的。 Teacher: Why not? You're a good student and I think you'll do a great job. 老师: 为什么不？你是个好学生，我相信你能做得很好。 Student: But I've never spoken in front of so many people before. I wouldn't know what to say. 学生: 但我之前从未在这么多人面前演讲过。我都不知道该说什么。 Teacher: Don’t worry. I’ll help you prepare the speech. Why not give it a try? 老师:: 别担心。我会帮你准备演讲稿的。为什么不试一试呢？ Student: OK, I guess I have nothing to lose. 学生: 好吧，我想我没什么可损失的了。