他们正在打电话用英文怎么说

他们正在用英语打电话是 They are speaking on the phone in Engpsh。

这个短语来自英语习惯用语，表示正在通过电话交流。

例句：

I can hear them speaking on the phone in Engpsh. (我能听到他们用英语打电话)
She was speaking on the phone in Engpsh when I walked in. (当我走进来时她正在用英语打电话)

希望这些信息能帮助你！