定语从句中 被动语态和完成被动语态的区别

题目

定语从句中 被动语态和完成被动语态的区别
一道题：
you may try some of the techniques______(outline)above.
这道题我个人很模糊
1.outlined
2.have been outlined
3.being outlined
这三个怎么区分呀
you may try some of the techniques which are outlined above.
you may try some of the techniques which have been outlined above.
怎么办 迷糊了~~~
求高手详细分析一下

答案

此题选outlined,the techniques的后置定语.you may try some of the techniques which are outlined above.you may try some of the techniques which have been outlined above.以上两句是定语从句,第一句表示完成...