not at all在口语中十分常见,由于其实际意思往往与其字面意思相去甚远,所以许多同学常常用错｡现将其在初中英语中的主要用法归纳如下,以帮助同学们正确使用它｡
　　一､ 用于回答别人的“感谢”,意为“不用谢;不客气”｡例如:
　　A: Thank you very much. 多谢你了｡
　　B: Not at all. 不客气｡
　　A: Thanks for helping me. 谢谢你帮助我｡
　　B: Not at all. I enjoyed it. 别客气,很高兴能帮你｡
　　A: Thank you very much. 非常感谢你｡
　　B: Not at all. It was the least I could do. 不用謝,这是我应该做的｡
　　二､ 用于回答带有感谢性质的客套话｡意为“没什么;哪里哪里”｡例如:
　　A: You are very kind. 你真好｡
　　B: Not at all. 没什么｡
　　A: It’s very kind of you. 你真客气｡
　　B: Not at all. 哪里哪里｡
　　三､ 用于回答别人的“道歉”,意为“没关系”｡例如:
　　A: I’m sorry I’m late. 对不起,我迟到了｡
　　B: Oh, not at all. Do come in. 噢,没关系,请进来｡
　　A: I’m sorry to keep you waiting. 对不起,让你久等了｡
　　B: Oh, not at all. I’ve been here only a few minutes. 哦,没关系,我也刚到几分钟｡
　　四､ 用来表示否定意义(是no的加强说法),意为“一点也不;完全不”｡例如:
　　A: Are you busy? 你忙吗?
　　B: Not at all. 一点不忙｡
　　A: Is it difficult to study English? 英语难学吗?
　　B: Not at all. 一点不难｡
　　A: I’ll be away on a business trip. Would you mind looking after my cat? 我要因公出差,请帮我照看一下我的猫,你介意吗?
　　B: Not at all. I’ll be happy to. 一点不介意,我很乐意｡