一个英语语法疑问.一般被动式：tobe+过去分词和being+过去分词的差别是什么?要怎么区分?我都分不清,还有完成被动式：tohavebeen+过去分词和havingbeen+过去分词又怎么区分呢?

Question

一个英语语法疑问.
一般被动式：to be +过去分词 和 being+过去分词的差别是什么?要怎么区分?我都分不清,
还有完成被动式：to have been +过去分词和 having been +过去分词又怎么区分呢?

Answer 1

你可以从事态来对他们进行区别及意思上也可以
to be done是将来时态 being是进行时态
to have been done还没有完成的事情但将要完成
The building to have been done in three days is her.
having been 则是过去已完成的了