While playing basketball,he fell down and hurt his knees.
While playing basketball,he fell down and hurt his knees.
改写：While basketball,he fell down and had his knees hurt.
改写：While basketball,he fell down and had his knees hurt.
赞 marchapply 幼苗
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While he was playing basketball,he fell down and had his knees hurt.
1年前
7
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he likes playing basketball,too.
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