在餐厅用英语怎么说

在餐厅用英语可以说 dining in a restaurant。这个短语来源于英语中的语法结构，在餐厅这个地点作为状语，用介词 "in" 表示，而用餐则是动词 "dining" 的现在分词形式。

下面是一些英文例句：

I'm going to a restaurant for dinner tonight.
We're thinking of dining in a new restaurant downtown.
Are you free to join us for a meal at the restaurant?
I heard there's a great seafood restaurant near the beach.