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hAD DonE 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 是现在完成进行时,表过去发生的动作一直在进行到现在。 We have reading an interesting book since last week. have done 是现在完成时,表在过去发生的动作对现有影响。 So far I have been to Beijing twice. had done 是过...

因题干条件不完整,缺少文字,不能正常作答。

have been doing 是现在完成进行时,表过去发生的动作一直在进行到现在. We have reading an interesting book since last week. have done 是现在完成时,表在过去发生的动作对现有影响. So far I have been to Beijing twice. had done 是过去完...

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。

现在完成时have done 有无明确时间状语 I have visited the temple. I visited the temple 3 days ago. 从过去发生延续到现在 She has lived here for 2 years . 一直延续到现在 She lived here for 2 months 2 years ago. 过去曾延续过 特殊用...

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...

恩 我先来说一下例句 一。His trousers was been worn out. (这里的 过去分词是做表语,表明一种状态) was been done,而这里的逻辑主语又是他的裤子,所以用被动,是被他穿破的 二。 The bicycle is been riding by my brother now. (这里的 ...

to do 在开头 1.做主语 To win this competition is our goal. 赢得比赛是我们的目标。 2.做状语,表目的 To win this competition, we must fight. 要赢得比赛,我们必须努力奋斗。 doing在开头: 1.做主语 Winning this competition is the bi...

= =很基本哦 一般来说呢,大多数情况下 to do 表未来 doing表正在干嘛 being done是正在干嘛的被动 had done是过去完成 was doing是过去的正在干嘛 其实吧,只要记住to do表未来,be doing表正在,have done表现在完成,had done表过去完成,然...

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