一般疑问句是这样,因为这样的句子有助动词do/does/did提问,所以动词要变回成原形; 但有些特殊疑问句,即主语是特殊疑问词的,则原句中的动词不需要进行任何改动: Who was here a moment ago? which belongs to you? What was done just now?
第2个回答 2008-01-21
现在完成时不是 Have you been to Beijing? Where have you been? 着里的been是be的过去分词,不是原形本回答被提问者采纳