有,但是很少,仅限于一些既可以作介词也可以做副词的“小词”,如 across、around、in、up 等： I tried to get my point across.（副词） It's hard to get across the river.（介词） I'll take you around.（副词） I'll take you around the town.（介词） She has already moved in.（副词） She has already moved in the house.（介词） .
