关于MAY HAVE BEEN的用法

当它表过去时，为什么不用变成MIGHT HAVE BEEN

关于MAY HAVE BEEN的用法 关于must have been 关于have been 的句子问题 eclipse中，“The local variable XXX may not have been initialized”是什么意思 请输入关键词You are about overwrite a file that may have been created using A clue as to why Americans may have been more honest in the past lies in the Abe Lincoln story. 关于Have you been to的选择题（初中） 关于 have been 的问题~~我快疯 拉 关于I have been working all morning这句子的！ May I have