to agree with 姐係點解啊???

to agree with 即係話 '跟某d事/某d人持相同意見", 簡單講, 即係"同意"某事或同意某人(所講既觀點)既意思..
e.g. I agree with Peter in this case. I agree with it (referring to Peter's point).

但係, 當用到 agree TO 時, 意思就局限於"同意或接受一件事, 而唔包括人". agree to (something)
e.g. I agree to your plan.

另外, 適合既英文, 可以用 "suit"
e.g. Would next Monday night suit you?
e.g. The dress suits you very much! It's beautiful!

to agree with 即係同意咁解
例如agree with (something) 咁樣用

適合可以用suit
例如 will that time suit?(這時間合適嗎??)