问以下以下这个句子中的成分是甚么?：I saw him playing basketball .中的 playing basketball 做甚么?汉语是这样的：我看到他正在打篮球.为什莫不能写成：I see he is playing basketbaii.要写成：I saw him playing basketball .
问题描述：
问以下以下这个句子中的成分是甚么?：I saw him playing basketball .中的 playing basketball 做甚么?
汉语是这样的：我看到他正在打篮球.为什莫不能写成：I see he is playing basketbaii.要写成：I saw him playing basketball .
答