不可以。say hi的字面意思是“说一声嗨（你好）”，一般用在say hi to sb.中，意思是“和某人打招呼”。例句：Okay, so say hi to my friend and tell him that you like the hat. -Say Hi to people and make friends with your colleagues. -和你的同事打招呼，交朋友。 I ...