问题标题：
初二英语whenpeoplewatchtheshowtheyusuallyplayaroleindecidingthewinnerwhenpeoplewatchtheshowtheyusuallyplayaroleindecidingthewinner为什么decide决定要变形啊.还有talentshowsaregettingmoreandmorepopular的g
问题描述：
初二英语whenpeoplewatchtheshowtheyusuallyplayaroleindecidingthewinner
whenpeoplewatchtheshowtheyusuallyplayaroleindecidingthewinner为什么decide决定要变形啊.还有talentshowsaregettingmoreandmorepopular的get要变形
刘建广回答：
playtherolein就是在某方面发挥作用
in后面接动名词
所以decide要变为动名词
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