1)agree with + sb/ sth …
同意某人/某人意见 或 某事适合某人
I quite agree with you
我完全同意你的意见
Hard work doesn’t agree with him .
艰苦的工作对他不适合.
2)agree (to) sth 同意/接受别人的计划/安排… (to可以省略)
He agreed (to) the plan / the date/ our arrangement. .
3)agree on/ upon … 双方协商达成一致…
Can we agree on a right price/date ?
4)agree to do sth =agree doing sth disagree to do sth
agree sb to do sth 没有此句型
5)agreement disagreement
have disagreements in … 在某方面有分歧
例句：
I agree with you, as it happens.
我恰恰和你意见一致。
I'm half inclined to agree.
我不十分同意。
We, the undersigned, agree to...
我们，本文件的具名人，同意…