My sister and I take turns at(cleaning)the house.为什么不用to clean或者clean?

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My sister and I take turns at(cleaning)the house.为什么不用to clean或者clean?
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My sister and I take turns at(cleaning)the house.为什么不用to clean或者clean?
My sister and I take turns at(cleaning)the house.为什么不用to clean或者clean?

My sister and I take turns at(cleaning)the house.为什么不用to clean或者clean?
介词后面用进行时

at 后面应该加一个名词性的东西

在打扫卫生方面轮流用at.你用to clean就是轮流去打扫卫生了,意思变了.你如果直接用clean是不对的,at是介词,后面接动词要用ing形式

take turns (at) doing sth
=take turns to do sth
用to clean的话,就把at去掉

take turns (at) doing sth
=take turns to do sth 轮流做某事
用to clean的话,就把at去掉