早上八点起来用英语怎么说

早上八点起来用英语可以说"get up at eight in the morning"。
"Get up"是动词短语，意思是"起床"。"At"是介词，表示"在...的时候"。"Eight"是数词，表示"八"。"In the morning"是副词短语，表示"在早上"。
例句：
I always get up at eight in the morning. (我总是早上八点起床。)
He gets up at eight in the morning every day. (他每天早上八点起床。)
She set her alarm to get up at eight in the morning. (她设置闹钟早上八点起床。)