been

Have/Has been done 与Have/Has done 的区别只在语态使用的区别，如下:1、have been done是现在完成时的被动语态，表达的状态是一种被动的，一般主语用物。如:His homework has been finished before he went home.他的作业在回家之前就被完成了。2、have done是现在完成时的主动语态，表达的状态是...

打开文明5时出现 A debugger has been foud running in your system. please unload it from memor\x0d\x0a调试器已经发现在系统上运行。请卸载，意思就是开了两个程序

None of the students have been to the Great Walli have been to shanghai twiceI have been to New York since two years ago.They may not have been to the city.Is the restaurant which you have been to full of foreigners?你去的那家饭店，里面是不是都是老外在吃？I have been ...

- Had been:通常与一个明确的过去时间点连用,表示从过去某个时间点到另一个过去时间点的连续性。 例句: - We have been friends for a long time. (我们已经是好朋友很长一段时间了。) - She had been living in New York before she moved to London. (她在搬到伦敦之前一直住在纽约。) 5. 动作或状...

3. 现在完成时,例句:She has been to New York twice. 她已经去过纽约两次。 4. 现在完成进行时,例句:He has been teaching math for 10 years.他已经教数学10年了。 5. 一般过去时,例句:I bought 2 comic books yesterday.昨天我买了2本漫画书。 6. 过去进行时,例句:We were playing basketball at ...

5.have been doing 与have done 前者表示不间断 地 一直作 某事 ，后者表示已经做了某事。或者 强调动作发生的起点 。如 he has been studying english for three years.三年来 他一直 在学习 英语。 he has studied english for three years他学英语已经三年了。 其实这两句 并没有大的 区别 ...

1，arrive within 5 minutes 在5分钟内到达 2，是介词，没有具体意思 3，bother这里是名词，前面是so much ,所以必须用名词 4，two persons 5,表示他还在那儿。是现在完成时表状态。6，对。7，是。仅供参考 For

His grandfather died ten years ago.His grandfather has been dead for ten years.It's ten years since his grandfather died.It has been ten years since his grandfather died.His grandfather has been dead since ten years ago.免费赠送你一句：Ten years has passed since his grandfather ...

1. 一般现在时:do 2. 现在进行时:be doing 3. 现在完成时:have done 4. 现在完成进行时:have been doing 5. 一般过去时:done 6. 过去完成时:had done 7. 过去将来时:would/ should do 8. 过去进行时:was/ were doing 9. 一般将来时:shall/will do 10. 将来进行时:will be doing 11...

这肉放在外边已有好几天了，都开始有臭味了。3、He had been warned not to tell anyone about it.曾经叮嘱他不要和任何人讲这事。4、When we returned we found that our home had been burglarized.当我们回来时我们发现我们家遭到了撬窃。5、The earthquake had been predicted several days ...