1) agree
A: I think she's a great singer.
我觉得她是一个很棒的歌手。
B: I agree. / I couldn't agree with you more. / I couldn't agree more.
同意。/ 非常同意。
* 一般用虚拟语气couldn't
2) true
That's true.
的确,表示同意。
3) sure
That's for sure.
肯定的,同意。
That's for damn sure. ( 粗口)
That's for darn sure. (相对委婉 )
4) eye to eye 完全同意,观点一致
A: I believe China is one of the safest countries in the world.
我相信中国是世界上最安全的国家之一。
B: We see eye to eye on this.
完全同意。
5) take the words right out of my mouth
完全道出了自己的心声。
A: Wow! This is the best pizza I've ever tasted.
这是我吃过最好吃的披萨。
B: You took the words right out of my mouth.
我正想这么说。