whom did you meet yesterday问题

问题描述:

whom did you meet yesterday问题
whom 可否改成 who 还有就是meet 可否换成 met 如果能换成met 的话意思上一句有什么不同

whom did you meet yesterday?
whom可以改为who,但是meet不可以改为met,助动词did构成一般疑问句,后面需要动词原形.