他们对他很差。用英语怎么说？

他们对他很差。

They treated him dreadfully.

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

treated

adj. 已处理过的，精制过的，加工过的；v. 处理( treat的过去式和过去分词 )，探讨，对待，请（客）；

例句
Single people are treated as an aberration and made to pay a supplement.
独身者被当成异类，而且要付一笔额外的费用。

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。

dreadfully

adv. 可怕地，恐怖地，害怕地，<口>极其；

例句
It is a long time since a party leader delivered such a dreadfully flat speech as he did yesterday.
很久没有政党领导人像他昨天那样作如此枯燥无聊的演讲了。