what have you been up toup和to在句中是什么成分?什么词性?
问题描述:
what have you been up to
up和to在句中是什么成分?什么词性?
答
up 副词作表语,to介词作状语
what have you been up to
up和to在句中是什么成分?什么词性?
up 副词作表语,to介词作状语