有没有have been doing 这个时态?must have been doing呢?

有没有have been doing 这个时态?must have been doing呢? 有没有is said to have been doing的结构 to have been doing 和 having been doing 有什么区别,重点是have 和having说没有这两个语法现象的请绕道 有没有have doing这个说法?我们都知道现在完成时有have done 和have been done 两种用法,那么请问现在完成进行时中除了有have been doing外有不有have doing? have been doing sth 英语时态区分have done .have been doing.had done.had been doing.有什么区别. have been done 与 having been done 与have been doing与having been doing有什么区别 have sb done和have been doing有么? had been doing是什么语法?举个例子~有have/has been doing的说法吗? 有没有have sb doing sth 急could have been doing sth有没有可能翻译成“可能是在做...”?could have been doing sth有没有可能翻译成“可能是在做...”?帮我翻译一下这几句话吧There is a relentlessness to her campaign which should not be unde must have been doing与must have been done都表示推测,有什么区别呀? have been on 跟 have been doing有什么区别吗? have been doing 神马意思? what you have been doing has been doing have been done区别 have been done 与 having been done 与have been doing与having been doing有什么区别请举例句说明 have been doing 和have+过去分词有什么不同?RT 比如have been collecting 和have collected的不同之处