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1、ago 和 before 的区别在哪里啊1.ago 表示“从现在起的若干时间以前”，意思是“距今以前”，需和过去时或过去进行时连用。before 泛指“从 过去起的若干时间以前”，意思是 “距过去某时以前”“与其（毋宁）”，常和完成时连用，尤其在间接引语 中，如：I visited him three days ago, but he had gone to Shanghai a week before我三天前去访问他，但他已 与那时的一周前到上海去了。His parents died ten years ago他父母十年前都去世了。H e said that his parents had
2、died ten years before他说他父母亲十年前都去世了。H have never been there before我以前从来没有去过那里。2.如果不具体表明多少时间以前，只用 before 不用 ago，意为“从前、以前”。before 仍以副词的形式置于被修饰语后， 常与完成时候过去时连用。如：Have you seen this film before?He asked me whether I had been to the Great Wall before3.表示在某一点时间或事件以前时，只用 before 不用 ago，这种用法是将 before 当作介词或连词使用
3、。ago 不具有这一 功能。如：They will come back before six oclockIt is hoped that this will be finished before the year 1995希望这件工作将在 1995 年以前完成。另外，before 在句中的含义较多。不少句子中，before 虽然引导的也是一个时间状语，但是译成汉语时却不必译为“在 以前”。a.如果 before 引导的从句动作发生得晚或慢，可译成“才”。这是主句主语或是名词、代词，或用it 作形式主语H e had almost knocked me down before he saw m
4、e他几乎把我撞倒才看见我。I t will be hours before he arrives要过几个钟头他才回到达。You must sow before you can reap有播种才能有收成。b.如果强调从句动作发生之前，主句动作已发生，可译成“未就”或“还没有就”。Before I could get in a word he had measured me我还没有来得及插话，他就给我量号了尺寸。Lu Ban built nine pavilions, but before he could finish the tenth, he heard a cock crowing鲁班建了
5、九个 亭子，但他还没完成第十个就听到公鸡叫了起来。c.有些句子中的 before 可译为“先然后”、“先再”。Dont count the chickens before they are hatched 不要乐观得太早。Be pupil before you become a teacher先做学生，再做先生。有些句中的 before 还可译为“在内”、“趁”、“没”。They arrived before I expected我没想到他们到得那么早。Study hard before it is too late趁早努力学习。I had better go now before it is
6、 too late最好我现在就走，免得太迟I will be through this book before three days have passed我要在三天内看完这几本书before sbknew it 一类习惯说法，常译为“不知不觉就”、“还没弄清就”、“不知怎么地就”。Time passed quickly and three months went by before Aqiao knew it时间飞快的流失，阿巧不知不觉地在那里度 过了三个月。He fell from the tree before he knew it他不知怎地一下就从树上掉了下来。4.加强语气，表示“早已
7、”的意思或使叙述显得更生动，ago 也可以用于完成时。如：I had thought that he had died at least twenty years ago我本以为他至少二十年前就去世了。In fact, I have long time ago known the secret其实我早就知道那个秘密。5.在表示对过去事情猜测的“情态动词have过去分词”或“动词的非谓语形式have过去分词”的结构中，ago 也可以和完成时连用。如：The building is said to have been destroyed in a fire two years ago据说那栋大楼在
8、两年前的一场大火中已被 烧毁。The incident must taken place years ago这是一定发生在好几年以前。You can not have met him a moment ago刚才你不可能遇见他。He may have left an hour ago他可能在一小时以前就走了。Having read the article a week ago, I know it very well一个星期以前我已读过这篇文章，我三者均可表示“空地”、“空间”，区别如下：1. 泛指一般意义的“空地”或“空间”，space 和 room 均可以用，但前者根据情况可用作可数或不可
9、数名词，而后者 通常只用作不可数名词。如：The large table takes up too much space room. 这张大桌子太占地方了。There isnt enough space room for all our luggage. 没有足够的地方可以放我们的行李。Here is an empty place, put the box here. 这里有个空地方，把箱子放在这里吧。注：place 表示“太空”、“宇宙”，是不可数名词，而 room 表示“房间”，是可数名词。He was staring into space. 他极目远眺。This is one of th
10、e largest rooms here. 这是这里最大的房间之一。2. place 表示“空地”，其含义通常比较具体，且往往指座位，有时与 seat 同义。如：Well try to get places (=seats) at the front of the hall. 我们要设法弄到大厅前面的座位。There are only two places (=seats) left for tonight. 今晚只剩两个座位。A ：Is there any room space in the boat? 船上有空处吗?B ：Yes, that place in the corner is empty. 在那边角落里还有个空位。