从句中也会有主谓宾吗?

当然存在啦。
一个简单的例子：I remember that Tom attended the meeting last week.

会的

I know staying with this man is not my dream.

staying with this man is my dream 是宾语从句

Staying with this man这件事是从句的主语
is是谓语
my dream是宾语

有啊。比如：你告诉我昨天你揍了李四。我后面的话是从句，那从句里你是主，揍是谓，李四是宾…应该是这样的，初中的知识，忘的差不多了…