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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...

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...

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...

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...

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;...

was doing是过去进行时,表示过去正在发生.例如:She was washing when her son came in.(她儿子进来时她正在洗衣服.) had been doing是过去完成进行时,基本相当于过去完成时,但可以强调动作延续.例如:They had been playing chess for the wh...

had been done过去某个时间之前已经被做、被完成 had been doing过去某个时间之前已经在做或者继续在做 had be done是错的。时态和语态多不对。 had being done也是错误的。时态和语态都不对。 had纯粹的过去动作。

现在完成进行时 现在完成进行式:比如说, have been working 表示,过去已经在工作,并且现在还在工作. 与现在完成时的区别是一、现在完成时 动词发生在过去,影响到现在,延续到现在,某种经历. 句型 基本结构:主语+have/has+过去分词(done) ①肯定...

has been doing表示动作到现在为止一直在做 I have been waiting for you for an hour。 had been doing表示动作到过去某一时刻为止一直在做 I had been waiting for you for an hour until you finally reached。

先按照被动语态区分,havebeendone是被动,其它都是主动(bedone形式都是被动)havedone现在完成时,havebeendoing现在完成进行时(bedoing是进行时,而havedone是完成,be的过去分词是been,于是就是现在完成进行时)willhavedone由于有havedone...

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