see的被动用法有哪些

被动用法是be seen，例如：

1、The opera was the place to see and be seen.歌剧院是个名流和时尚人士竞显风采的地方。

2、It remains to be seen whether his project will fly.他的计划能否成功尚需拭目以待。

3、It can be seen that certain groups are more at risk than others.看得出，有的组风险大，有的组风险小。