have been 和 has been 只是根据前面主语的人称而定。都是一般现在完成时 简单来说如果前面是I,you,we以及复数形式的主语则是have been 第3人称单数如he,she,it,则是用has been 有been的话表示被动语态 had been则是过去的过去,是过去完成时,和上面一样有been的话表示被动语态 如果都加done的话,都是表示已经做完某个事情,只是时态不同 had been 单复数用法没有区别 第一第三人称都是用had
1. has been done 和have been done 都是一般现在时,前者用于单数主语;后者用于复数主语。 比如: The room has been cleaned. 房间已经被清扫了。 The rooms have been cleaned. 这些房间已经被打扫了。
2。had been done是过去完成时,用于讲述过去的过去 (当你想说发生在过去的两件事时,就要分清谁先谁后。先发生的用过去完成时,后发生的要用过去时)。 The rooms had been cleaned when I came. 我来的时候,房间已经被打扫了。
第2个回答 2009-02-23
has been 和have been 都是现在完成时,前者用于主语是第三人称单数,后者用于不是第三人称单数。而had been是过去完成时,表示的时间是“过去的过去”。 比如:He has been to Beijing before. We haven't been to Shanghai yet. They said they had been there before. 如果在后面加done的话,就表示被动的含义。 又如:His homework has been finished now. The exercises hav been done . He said that the building had been built .