What you said yesterday is right.是不是应该改成what you said in the right yesterday?

What you said yesterday is right.
是不是应该改成
what you said in the right yesterday?

原句是典型的主系表结构,
What you said yesterday是主语从句,可以改成Something that you said yesterday is right,译为"我昨天所说的是对的",强调的是事实,所以is不需要改成was.
相信我 I am an English teacher.给个建议啊：好好把名词性从句看看就懂了.加油~

What you said yesterday is right.
你昨天说的是正确的
因为是昨天说的 也就是过去试 英语在这一点很specific
不像中文 是不是过去试有时候看不出来
所以要改成
What you said yesterday was right
而不是is right

你昨天说的是正确的
这是一个主语从句,What you said yesterday 是句子的主语.

- You were right yesterday.
- What you said yesterday was right.
- You were in the right yesterday.