Don't spend your free time playing computer games.中play为什么要加ing?

Don't spend your free time playing computer games.中play为什么要加ing?
Don't spend your free time playing computer games.中play为什么要加ing?

Don't spend your free time playing computer games.中play为什么要加ing?
spend time/money (in) doing sth 花时间/钱做某事 如：
He spends much time playing football.
They spent 1,000 yuan( in) buying the TV set.

固定搭配spend 时间 in doing ，意思为花费某时间做某事，其中in可以省略，就像题中那样

固定搭配啊 同上

spend time (in) doing sth.固定搭配

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