英语礼貌用语多，根据情景来选择。

Hello! Hi!是\"你好！\"，见面问好常用到。Goodbye!是\"再见！\"，Good night!道\"晚安！\"。同学多日不见面，相见问好\"How are you?\"。答语常用\"I'm fine. Thank you.\"。初次认识新朋友，握手问好\"Glad to meet you.\"。打扰别人问问题，开口先说\"Excuse me.\"。别人关心帮助你，感谢用语\"Thank you.\"。致谢用语要牢记，That's OK.\"没关系。\"。有了过错表歉意，I'm sorry.\"对不起。\"。客人来访把门开，Please come in.\"请进来。\"。Sit down, please. \"请坐下。\"。Please have some tea . \"请喝茶。\"。征求意见和请求，\"May I... ?\"先开头。同意许可Yes. / Sure. / Certainly. / OK!别忘了。