明天晚上我们将要和格林先生一家一起吃晚饭.的英文

We will have dinner with Mr Green's family tomorrow .

Next evening（night） we will have a supper（dinner） with the Greens together.
next evening（night）是下个晚上的意思 也就是明天晚上
supper（dinner）是晚饭 have a supper（dinner）就是吃晚饭
together是一起
The Greens就是格林一家了
也可以这样翻译：We will have dinner with the Greens together next evening（night）

We will have dinner with the Greens at tomorrow night.
初一，有不对请谅解！

Tomorry evening we will have dinner with the Greens.

同学,才看到你向我们团队 王牌英语团 发来的求助题,现在为你解答
翻译：We will have dinner with the Greens tomorrow evening.
解析：the Greens 格林一家,即the + 姓氏的复数,表示.一家人,或.夫妇
有不明白的请继续追问,

We will have dinner with the Greens tomorrow evening. 或者 Tomorrow evening we will have dinner with the Greens.