A pleasure.=My pleasure=It‟s a/my pleasure.used when someone has thanked you for doing sth and you want to say that you were glad to do it.“不客气，不用谢”，别人感谢你时用于表示你很乐意做某事With pleasure: used to say politely that you are happy to do sth that someone has just asked you to do.“非常乐意”，当别人请自己帮忙时，自己爽快的接受（伴随着快乐）。

‘W ould you take this along to the office for me?’ ‘With pleasure’Don’t mention it.Don’t 'mention it(informal) used as a polite answer when sb has thanked you for sth:‘Thanks for all your help.’ ‘Don’t mention it.’Don’t mention it. = my pleasure. = it was nothing. / think nothing of it. = you are welcome.Forget it1. used to tell someone that what they want is impossibleI'd like to take a week's holiday." "Forget it, we're too busy."2. used to tell someone that something is not important and not to worry about it"I'm so sorry about that cup." "Oh, forget it - I've got plenty."No problem1. used to show that you are happy to help sb or that sth will be easy to do:‘Can I pay by credit card?’ ‘Yes, no problem.’2. used after sb has thanked you or said they are sorry for sth:‘Thanks for the ride.’ ‘No problem.’考点5. No wayused to say that there is no possibility that you will do sth or that sth will happen:考点6 No hurryMind当问你是否介意（某人）做某事时，如果你同意，那就是不介意，要用no 来回答；如果你不同意，那就是介意，要用yes来回答。

此时，mind与“oppose反对”意思相近。

…Sorry, do you mind if I smoke here?’‘ Yes, I do. / Yes. Better not.’‘Not at all.’Never mind用于当别人为某事烦恼或向你道歉时。

‘Never mind.’Go aheadto encourage sb. to do sth. without hesitationNot reallyused, often in negative sentences, to reduce the force of sth you are saying:Not exactlyNot a bit / not a littleNot to worryIt doesn’t matter.matter (to sb)：to be important or have an important effect on sb/sth:It doesn‟t matter to me what you do…What did you say?‟ …Oh, it doesn‟t matter‟ (= it is not important enough to repeat).‟…I‟m afraid I forgot that book again.‟ …It doesn‟t matter (= it is not important enough to worry about).‟That’ ok/ fine/ all right.1. It's all right/alright ( ALSO That's all right/alright ) 不用谢,没关系an answer to someone who has just thanked you for something or just said they are sorry for something they have done"Thank you for the flowers." "It's all right . I thought they might cheer you up.""I'm sorry I broke the vase." "Oh, that's all right . It wasn't very expensive."1.If you say that someone or something is all right, you mean that you find them satisfactory or acceptable.Is it all right with you if we go now?...Take your time: to use as much time as you need without hurrying: 不急，慢慢来Take it easy:used to tell sb not to be worried or angry: 别担心，别生气How do you find…有时how do you find sth. ?是问你觉得某物怎么样，同What do you think of….? How do you like..?Why not? 和isn’t it?“Why not ”is used to express agreement.用来表示同意某建议或想法，并不是问“为什么不可以?”。

联系：有些反意疑问句也并不是表示疑问，而是一种习惯，一种语气，如：A: It‟s fine, isn‟t it? B：yes, it is, isn‟t it?Why not do something? 表建议做某事；why do something做某事没有必要Thank you按照英语的习惯，别人赞美奉承自己时，应表示感谢，而不是中国式的谦虚。

I’m sorry/ I hate to say this, but…It doesn’t hurt to askNot at all1. used as a polite reply after someone has thanked you "Thanks for helping." "Not at all."2. used to say 'no' or 'not' strongly "Was he a nuisance?" "No, not at all." I'm not at all happy about it. Help yourself.to give something to someone or to take something for yourself : help在这里是“拿、取”之意，多用于食物，也可用于其它东西。

"Might I have some more bread?" "Please, help yourself !"Come one on 近义于NOT BELIEVEinformal , used to tell someone that you do not believe them or that you disagree with them, or to show that you are angry with them 得了吧。

(表示不相信，不同意或生气)Oh come on, Ian, you made the same excuse last week!2. come on phrasal verb HURRYsaid to encourage someone to do something, especially to hurry or try harder, or to tell you something 快点，加油，Come on - we're going to be late if you don't hurry!Come on, Annabelle, you can tell me. I won't tell anyone.It’s up to you.What’s up?So what?used to mean 'it's not important' and 'I don't care' 那又怎样？How come?used to ask how or why something has happened especially when you are surprised by it= what is the explanation of…?“怎么回事？怎么搞的？为什么？怎么会这样？”通常用在你觉得奇怪而问为什么的时候。

So how come you missed the train? "We had to stop in Birmingham." "How come?"What for?You guessed it. 固定用法，“你猜对了”Guess what? / you’ll never guess.used when you are about to tell someone sth that will surprise them.“猜猜看/ 你永远也猜不出”，用于即将告诉某人令其惊讶之事时Guess what! Jane is getting married. You will never guess who I saw today.bother表示同意和赞成：Great, exactly, definitely, absolutelyI can’t help it. / it can’t be helped.。