我们不承认他为合法继承人。用英语怎么说？

我们不承认他为合法继承人。

We don't recognized him to be the lawful heir.

we

pron. 我们，咱们，笔者，本人，朕，人们；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

recognized

adj. 公认的，经过验证的；v. 认出( recognize的过去式和过去分词 )，承认[认清]（某事物），赏识，承认…有效[属实]；

例句
The patient recognized one of the women as the apparition she had seen.
病人认出其中一个女的是她曾见过的幽灵。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

be

v. 是，有，存在，做，成为，发生；aux. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质；

例句
The older child should be able to prepare a simple meal...
那个年纪稍大的孩子应当会做一顿简单的饭菜。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

lawful

adj. 合法的，法定的，守法的，法律许可的；

例句
It was lawful for the doctors to treat her in whatever way they considered was in her best interests...
医生们采用他们认为对她最有利的方法为她治疗是合法的。

heir

n. 继承人，后嗣，嗣子；

例句
It's only the second time a potential heir to the throne has married a commoner.
一位可能的王位继承人与平民缔结婚约，这种事还只是第二次。