Before 和ago, With pleasure-- All right --Not at all用法小结before和ago都能表示在一段时间以前，但是二者的内涵和具体用法有明显的区别： 1. before表示从过去或将来某一时间算起多少时间以前，由于与这一时间状语连用的行为先发生在过去或将来某一时刻之前，因此往往出现在过去完成时态或将来完成时态中例如：① I called him up last night， but his mother told me he had left for Wuhan two days before.② She said that she had married him five years before.2.如果不具体表明多少时间以前，before意为"从前；以前"，表示从现在开始追溯到过去一段时间，或者主句的谓语动词表示的是经常、反复发生的行为，以副词的形式置于句末，可以用在现在完成时态中例如：①I have never been to Beijing before.②Have you ever seen a tiger before?③ I often go over the lessons that I have learned a few days before.注意： before前的时间状语如果是特定的，含义不一样。
试比较：He said he had arrived here a day before. (一天前)He said he had arrived here the day before. (前一天)3. ago指的是从现在起到过去时间的某一点的一段时间这个时间状语常与一般过去时态或过去进行时态连用例如：① I graduated from the college twenty years ago.②I was asked what I was doing a month ago.4. 表示在某一时间点或事件以前时，只能用before，不用ago因为这种用法是将before当作介词或连词使用ago不具有这种功能例如：① He will come back before eleven o'clock.② Where did your brother study before he joined the army?③ It was hoped that this would be achieved before the year 2006.5.按语法规则，ago只能与一般过去时连用，但在since three years ago这类短语中能与现在完成时态连用。
因为three years ago构成一个名词短语，共同作since的宾格，意为"自从三年前以来"例如：① He has been here since three years ago.② I have taught English in this school since twenty years ago.6. 含before的从句一般不用将来时态，如果采用"will / would +V."时，一般被认为是情态或虚拟语气例如： I would die before I would confess to it.7.如果before从句是一般过去时态，所暗示的是过去发生的事，主句则宜用过去完成时，语义偏重于过去某阶段的行为或状况时，还可与一般过去时态连用例如：① I had never seen a Red Army man before I arrived in Xi'an.② They asked me things that happened before the boy was born.8. 不少的语法书上说，before引导的从句习惯上不与否定的主句连用，要用until实际上二者都可以，有时在意义上有些区别。
试比较：He didn't arrive until I returned. 直到我回来时他才到达He did not arrive before I returned. 在我回来之前他尚未到达I didn't manage to do it until you had explained how. 直到你解释了如何干，我才设法完成了那项工作I didn't manage to do it before you had explained how. 你解释了如何干之后，我才设法完成了那件工作9. before在句中的含义比较灵活，虽然before引导的也是一个时间状语，但译成汉语时却不必死译为"在……以前"可以采取下面几种译法：(A)译为"……才"；(B)译为"……就"；(C)译为"尚未"、"还没有"、"来不及"、"不要"、"别"；(D)译为"在……的时候还没有"；(E)译为"如果"、"否则"、"免得"；(F)译为"到"、"等到"、"没等……就"；(G)译为"然后"等例如： A. It will be five years before we meet again. 要等五年我们才能再见面。
We waited a long time before the train arrived. 我们等了很长时间火车才到达 B. I hadn't waited long before he came. 我没等多久他就来了 He had not gone a mile before he felt tired. 还没走一英里路，他就觉得累了 C. His father died before he was born. 他尚未出世他父亲就去世了 Catch him before he escapes. 抓住他，别让他跑了 Take this computer before you change your mind. 买了这台电脑，不要三心二意了 D. We arrived there before it began to rain. 我们到达那里的时候还没下雨 E. Go before I call the police. 走吧，否则我叫警察了 I had better go now before it is too late. 我最好现在就走，免得太迟 Pigs will fly before he'll be a scientist. 如果他当科学家，猪都会飞了。
F. The crops will die before the rain fall. 等到天下雨，庄稼早枯死了 Before I could sit down, he offered me a cup of tea. 没等我坐下，他就给我端上一杯茶 G. I shaved before I went to the party. 我刮了脸，然后去参加宴会初中英语易混词辨析after，in，laterafter，in和later用来指时间时，都表示“在……之后”，但它们的用法是有区别的当表示以现在时间为起点的“在……之后”时，in后接时间段，after后接时间点He often comes back after ten o’clock. 他经常十点后回来He’ll be here in a week. 他将在一周后到这里当表示以过去某个时间为起点时，after之后可接时间点或时间段而in只表示未来的事情，一般不用于过去某个时间After a few minutes she started to cry. 几分钟后，她开始哭了He said that he would come back in a year. 他说他一年后会回来。
after还可作连词，引导时间状语从句After he drank some water，he began to clean the table. 他喝了些水后，便开始擦桌子了Let’s play baseball after school is over. 放学后我们玩棒球吧later多用作副词，意为“稍后、……之后”，通常用于时间段之后，此时应与过去时连用当然，它也可单独使用，表示以说话时为起点，不确定的时间以后，此时多与将来时连用At first she was asleep. Half an hour later/After half an hour she woke up. 开始她睡着了，半小时后醒来了The radio says that the sun will come out later. 收音机里说太阳稍后会出来我测试 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 根据句意，用after，in或later填空1. Just seven the rain began to fall.2. He went there a few days .3. She will come to see us .4. I shall come round a day or two.5. He then left home，and came back a year. 答 案: 1. after 2.later 3.later 4.in 5.afterWith pleasure的用法1. 用来愉快地答应对方的请求或邀请 (在美国英语中多用Okay, Sure, Certainly 等)，意为：好的；没问题；十分愿意。
如：A：May I borrow your car? 我可以借你的车吗?B：Yes, with pleasure. 当然可以A：Will you join us? 和我们一起玩好吗?B：Thank you, with pleasure. 谢谢，我非常愿意A：Could you put me up tonight? 请你为我安排今晚的住宿好吗?B：With pleasure. 好的，没问题 2. 表示：高兴地；由于高兴如：She went red with pleasure. 她高兴得脸都红了They did the work with pleasure. 他们高兴地做了这项工作It’s my pleasure.的用法 用来回答感谢，意为：这是我高兴做的事； 别客气； 不用谢如：A：Thanks a lot. Bye. 谢谢了，再见B：It’s my pleasure. Bye. 别客气，再见A：Thank you for helping me. 谢谢你帮了我B：It’s my pleasure. 别客气All right.的三种用法1. 表示赞同对方的意见，意思是“行，好吧”如：A：Let’s play football. 咱们踢足球吧。
B：All right. 好吧2. 用在系动词be(am, is are)之后，表示健康状况，相当于fine或well，意思为“身体好”，“病好了”如：A：How are you? 你好吗？B：I’m all right. 我很好3. 表示“令人满意的”“顺利的”如：His work is all right. 他的工作令人满意That’s all right. 的三种用法1. That’s all right. 用于对别人表示感谢的答语，意思是“不用谢，不客气”，相当于That’s OK. /Not at all. /You’re welcome. 如：A：Thank you very much. 非常感谢B：That’s all right. 不用谢2. That’s all right. 用于别人向你道歉时的答语，意思是“没关系”，相当于Never mind /It doesn’t matter. 如：A：I’m sorry, I’m late. 对不起，我迟到了B：That’s all right. 没关系3. That’s all right. 用于对对方某一情况表示“没问题”，“行了”或“可以了”。
如：A：Can I see your licence, please? 我能看看你的执照吗？B：Sure. Here you are. 当然可以，给你A：That’s all right. Thank you. 没问题，谢谢That’s right. 的用法是同意对方的观点或看法时的常用语，意思是“对”，“正确”如：A：What’s four and six? 4加6等于几？B：It’s ten. 是10A：That’s right. 对了Not at all的用法1 用来回答感谢，意为：不用谢；不客气如： 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2 用来回答带有感谢性质的客套话，意为：没什么；哪里哪里如： 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。
3 用来回答道歉，意为：没关系如： 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4 用来表示否定（是No的加强说法），意为：一点也不；完全不如： 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。