在他旁边用英语可以表达为：beside him。

该表达来自英语中的介词"beside"，意思是"在...旁边"。例如：

She stood beside him, holding his hand tightly. 她站在他旁边，紧紧地握着他的手。

The dog lay beside the fireplace, enjoying the warmth. 狗躺在壁炉旁，享受着温暖。

另外，在他旁边还可以表达为：next to him、by his side、adjacent to him。例如：

I sat next to him on the train. 我坐在他身旁的火车上。

She stood by his side, supporting him. 她站在他身旁，支持他。

The park is adjacent to his house. 公园在他的房子旁边。