He’s agreed to our suggestion about the holiday.为什么是be agreed to?

He’s agreed to our suggestion about the holiday.为什么是be agreed to?
He’s agreed to our suggestion about the holiday.为什么是be agreed to?

He’s agreed to our suggestion about the holiday.为什么是be agreed to?
这里 he's= he has

这是英语中的固定句型。背过就好。
学语言，切勿问为什么。

agree to sth