1.He is down on his luck.请问down 是什么词性? 副词吗?答:有时连系动词后也可接副词作表语,这主要限于in, on, off, out, away, behind, up, down, over, through, around, round, below, inside, outside 等少数副词小品词以及 here, there, upstairs, downstairs 等少数表示地点或方位的副词:Is your mother in? 你母亲在家吗?Everyone is here ...