有.第一个play要加ing 因为:like doing something.喜欢做某事
think要加s.因为:she 是第三人称.
第二个play也要加ing.因为:它在句中做主语,动词做主语要用进行时.
beacuse前最好加个逗号,不然句子有些不通顺.
i know (that) she doesn't like playing sports,because she thinks (that )playing sports is very difficuit.