there were so many things for children to play on

there were so many things for children to play on

题目
there were so many things for children to play on
请问这里的on怎么理解 去掉可以吗?
答案
play 做及物动词可以不带介词,比如 play piano,play a game.如果宾语是 many things 就不能将 play 当作及物动词用,不及物动词接 many things 一定不能省略 on.
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