He wanted to know how many books( he bought ).误人子弟如何见得是‘ 误人子弟’ ，这是一句宾语从句：主句用一般过去时，从句要用相应的过去时， buy 的过去式是bought解释一下 he 从哪来？How many books does he buy?这句中就有he 呀，它变成陈述句，就得把助动词does 去掉宾语从句是一个完整的句子，哪个地方要用逗号？得了先信着 看你态度不错，，，