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hAD BEEn Doing

1、首先要区分has been done与 had been done的区别: have/has been done 是现在完成时的被动语态。表示某事被做,。 如:The problems have been solved.这些问题已经被解决了。 had been done 则是过去的过去,是过去完成的被动态时。(当你...

have been doing 网络 现在完成进行时; 现在完成进行时态; 完成进行时态; 现在完成进行; 将来完成进行时 Biological systems have been doing this for billions of years. 生物系统亿万年来一直都是这样。 had been doing 网络 过去完成进行时;...

这里的时态叫过去完成进行时,就是过去完成(had done)和进行时(be doing)合起来,最终结构是had been doing表示的是主动含义,还有延续的含义,表示我在戒烟前一直是每天三包烟。 被动的表达是be+done(过去分词),be动词后面跟的一定是过去分...

你好楼主, 这两个时态不一样,had been doing是过去完成进行时,就是相对过去的某个时刻来说已经对现在有直接影响并且还在进行的动作。 而have been doing是现在完成进行时,其表达的意思有两种:1.表示从过去某时开始一直持续到现在的动作,并...

1、首先要区分has been done与 had been done的区别:have/has been done 是现在完成时的被动语态。表示某事被做,。 如:The problems have been solved.这些问题已经被解决了。 had been done 则是过去的过去,是过去完成的被动态时...

1、首先要区分has been done与 had been done的区别: have/has been done 是现在完成时的被动语态。表示某事被做,。 如:The problems have been solved.这些问题已经被解决了。 had been done 则是过去的过去,是过去完成的被动态时。(当你...

是主动 这句是过去完成时的时态 不要把been就看成了被动 had been done是被动形式

1一直到过去某一时间为止,仍旧在继续进行的动作. They had been searching for six months when they found the treasure.当他们发现这些宝藏的时候已经寻找了六个月了。 他们发现这些宝藏是过去,寻找这个动作时过去的过去并且一直持续到他们发...

你好 为你的解析如下: have had 就是你已经有了什么 比如 I have had this dictionary since I was little. have done 就是你做过什么 比如 I have made a big buzzer shot. 我曾经打球时绝杀过。 had done 就是针对于过去的过去,理解起来就是...

1.I had learned 3000 English words by the end of last year 2.He had been working all day before the boss asked him to have a rest 3.I have already finished my work 4. I have been doing my work until now.

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