问题描述: have you studied recently?还是 did you have studied recently?还是二者都可以? 1个回答 分类:英语 2014-10-11 问题解答: 我来补答 have作助动词,所以只有have you studied recently正确.have做助动词与动词的过去分词一起构成现在完成时和过去完成时.Great changes have taken place the last two years.(JBⅥL3) They said that the Arab had stolen their camel.(JBⅤL4) 展开全文阅读