I搜趣网 don't agree with you on many things
我和你在许多事情上意见不一致
Seafood doesn't agree with me
我不适宜吃海鲜
第一句的agHgjqgree with是同意的意思，第二句则是相符、适合的意思

正确的句子应该是：
The dress ag//www.souquanme.comrees with me.

Actually,I don't agree with you.
I agree to your idea.

They agreed with us on some matters.
在一些事情上他们赞同我们。

agree with sb ：赞同某人的观点
agree on sth：就某一事件达成一致
agree wi//www.souquanme.comth sth：同意某事
agree to sth：和agree with sth 差不多
agree to do sth：同意去做某事