been是什么意思

been的用法和意思？

been的用法和意思：been是be的过去分词，作为动词，中文含义为“是”。been用在完成时和被动句中，其中现在完成时的构成为has/have+been/done，过去完成时的构成为had+been/done,当被动句的主语是物时，即用被动语态。例句：1、Scientists think that there has been life on Earth for millions of years.科学家认为生命存在于地球已经有几百万年了。2、They have been playing football for 3 hours.他们已经踢了3小时的足球了。3、I have been away from Paris for two weeks.我离开巴黎已经两星期了。4、There have been many changes in recent years. 近几年发生了许多变化。5、We had to work within the parameters that had already been established. 我们必须在已设定的范围内工作。

been和done的区别

been是be的过去分词；done是do的过去分词。常见的用法是have done和have been done，have done是主动形式的现在完成式，have been done是被动式的现在完成式。 done的含义及相关短语用法形容词adj.已完成的；煮熟的；合乎礼仪的；合乎规矩的感叹词表示接受建议）动词·做（do的过去分词）；干。 must+have+done：表示对过去事情的肯定推测，译成“一定做过某事”，该结构只用于肯定句。 can't+have+done：表示对过去事情的否定推测，译成“不可能做过某事”。 can+have+done：表示对过去行为的怀疑，用于疑问句，译成“可能做过……吗？”。 may+have+done：表示对发生过的事情的推测，意思是“可能已经”或“也许已经”，用于肯定句中。 been的含义及例句 been：be的过去分词，翻译成“是” have been：用于完成时，表示“已经过去” Scientists think that there has been life on Earth for millions of years 科学家认为生命存在于地球已经有几百万年了。

是be的过去分词v.曾经到过（某地been。1Been is the past participle of be.2VERB 曾经到过（某地） If you have been to a place, you have gone to it or visited it.He's already been to Tunisia, and is to go on to Morocco and Mauritania...他已经去过突尼斯了，还要去摩洛哥和毛里塔尼亚。1You are been in love, you know what it's like. 只要你曾经爱过，就一定知道恋爱的滋味。blog.sina.com.cn2It has been said that man is a rational animal. 有人曾经说，人是理性的动物。3By the time you get there the meeting will be over. 等你到了那里的时候，会议就该结束了。4There have been some problems but basically it's a good system. 虽然出现过一些问题，但这基本上仍不失为一个好系统。5It's been quite a day, one way and another. 从几方面看，这是不寻常的一天。6By this time next week we'll be in New York. 下星期的这个时候我们将在纽约。7There are only so many hours in a day. 一天不过这么几个小时。8Teachers are up against some major problems these days.老师们最近面临着一些重大问题。9The new methods are radically different from the old. 新的方法迥然不同于旧的方法。10The blood samples are sent to the laboratory for analysis.血样要送往实验室进行分析。11£ 50 should be enough to be going on with. 50英镑该够应付一时半会儿的了。12Would now be a suitable moment to discuss my report?现在讨论我的报告合适不合适？13Customers are thin on the ground at this time of year.一年里这个季节顾客很少。14No new SARS cases have been reported in the region.该区没有新增非典型肺炎病例。《牛津高阶英汉双解词典》15They are in work. 他们有工作。《牛津高阶英汉双解词典》16In practical terms this law may be difficult to enforce. 从实际的角度来看，这项法律可能难以执行。《牛津高阶英汉双解词典》17There's money to be made from tourism. 旅游业非常有利可图。《牛津高阶英汉双解词典》18High interest rates are a brake on the economy. 高利率阻碍了经济发展。《牛津高阶英汉双解词典》19New skin had to be grafted on from his back. 需从他的背部移植新皮肤。《牛津高阶英汉双解词典》20Scientists are still a long way off finding a cure. 科学家要找到一个治疗方法，还远着呢。《牛津高阶英汉双解词典》21It looks like we're going to be late. 看来我们要迟到了。《牛津高阶英汉双解词典》22Special conditions apply if you are under 18. 18岁以下者按特殊情况处理。《牛津高阶英汉双解词典》23The world's resources are finite. 世界的资源是有限的。《牛津高阶英汉双解词典》244, 6, 8, 10 are all even numbers. 4、6、8、10都是偶数。《牛津高阶英汉双解词典》25We are not far from my home now. 我们现在离我家不远了。《牛津高阶英汉双解词典》26Things are going well from what I hear. 从我所听到的来看，事情进展不错。《牛津高阶英汉双解词典》27There has been a move away from nuclear energy. 人们对于原子能的看法已经转变。《牛津高阶英汉双解词典》28There are 31 days in May. 五月份有31天。《牛津高阶英汉双解词典》29Quite a few people are going to arrive early. 相当多的人打算早到。《牛津高阶英汉双解词典》30Technically, the two countries are still at war. 严格说来，这两国仍在交战。