说明
don such a nice boy? The Children's Home was nice. The people there were kind and the boys were healthy. But what sort of a person was his mother? (VOA) 知道他母亲尚在, 使我很惊讶, 也使我对她感到很气愤。她怎么会忍心抛下这么可爱的孩子呢? 儿童之家办得很好, 那里的人都很亲切, 孩子们也都很健康。但他妈妈是个什么样的人呢?
what...on/on what
原书 PDF 第 1679 页
what...on/on what
what...on/on what
问
（A）On what is he lecturing?
(B) What is he lecturing on?
上面哪个用法是正确的？
答
上面两个句子的基本意义是完全相同的。只是句(A)是正式语体,并且很罕见。对于on which...?和which...on可以作同样的解释:
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On which of the topics is he lecturing? (CGEL) 他正在就哪个题目作报告?
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Which(girl) are you talking about? (CGEL) 你谈论的是哪一位(姑娘)?