6. 现在完成进行时：have/has+been+doing

现在完成进行时和现在完成时的区别：

eg：It has rained for 3 days.

It has been raining for 3 days.

现在完成时不强调某一动作在某段时间内持续发生，现在完成进行时表示某一时间段内某动作持续发生。

eg：I have been learning English for 5 years.

I have been learned English for 5 years.

（二）语态

一般进行完成

现在 am/is/are+过去分词 am/is/are+being+过去分词have/has+been+过去分词

过去 was/were+过去分词 was/were+being+过去分词had+been+过去分词

将来 will+be+过去分词

被动语态基本形式：be+动词过去分词；

eg：Forest have been cleared.

They were given a warm send off.

Their wedding will be held in the church.

不强调施动者，而只强调受动者；

eg：The book was written 20 years ago.