1.我一般觉得while后面加 be doing 形式 不过在你这种情况下when+ be doing也行的
2.这是个省略句His mother found(that) he was playing computer games last evening he was playing computer games last evening是that 引导的宾语从句,是一个独立的句子。he在这里做主语,所以不用him
例子:I think (that)he'll come.
3.楼上的说得很对。 he是三单,后面的动词要加s。 when he play soccer也是个宾语从句,但he play soccer是独立句子,任何情况下三单后面加S的规律是不变的。
恩 是对的 2中的he 是宾语从句中的主语所以不用宾格 For instance;She saw he was running in the playground. 3需要加S的,因为he是第三人称啊。
第2个回答 2008-05-24
1.He is happy when he is playing soccer. 2.His mother found he was playing computer games last evening. 这句话对不对? 有点别扭,但严格说是对的 2 中的he 为什么不用变宾格? 这句话完整句子是 His mother found that he was playing computer games last evening. 如一楼说的,2中的he 是宾语从句中的主语所以不用宾格 3.He is happy when he play soccer. 如果我这么写那么when he 后面的play用不用加 s? 要加,因为你用的是一般现在时