关于be in agreement的问题（请耐心看完,

关于be in agreement的问题（请耐心看完,
以下几个哪个对
1)be in agreement with sb=agree with sb
2)be in agreement with sth=agree with sth
3)be in agreement on sth=agree on with sth
4)be in agreement=agree
5)have an agreement with sb=agree with sb
6)have an agreement with sth=agree with sth
7)have an agreement on sth=agree on with sth
8)have an agreement=agree

1,2,3,4,6,8 对,5,7 不对.（7 语法不对）
基本上
be in agreement 和 agree
have an agreement with sth.和 agree with sth.
是一样的,但
have an agreement with sb 就不同了,
其正确意思是 “与某人有协议” .
有协议不等于精神上或理念上一致.
有协议是双方通过商讨后达成的协议/契约,
尽管你理念上未必同意协议内所说的东西,但你同意履行协议里的条款,
比如：
I have an agreement with Tom to buy the car,which is a Volvo.Tom thinks Volvos are great cars.I am not crazy about Volvos.I think Hondas are better.But we WILL buy the Volvo,because I did make that agreement with him,even if I do not agree with Tom on Volvos being great cars.
再问： 7的语法为什么不对，是不是没有这种搭配
再答： agree on with sb. 是错的，没有这种搭配， agree on 后面要有宾语，宾语短语或宾语从句，即 比如 agree on principle with him （宾语） agree on the viability of the project with him （短语） agree on the fact that the project is viable （从句） 我才看到第 3 句的后半部分，同一个理由这也是错的。
再问： 我打错了，应该是 be in agreement on sth=agree on sth have an agreement on sth=agree on sth 这样是对的吗
再答： 是，这样就对了。 别忘记采纳，谢