has\have has\have been in例句：How long have you been in class today?只限于刚学到的现在完成时啊在我的这个例句中“How long have you been in class today？”的这个“have\has been in“意为“在.......多长时间”，

have,has, there be 和 have、has的区别! there be与have (has)的区别 have,has,语境造句, have,has的过去式 用have,has造句 They______two basketballs【have,has】 They newnames.have has have/has not heard has与have Mary must ______lessons. A.has B.have c.be 用have,has,或there be的正确形式填空 all that can be done has been done 为什么要用has,不用have 请帮我解释一下这三个词（组）的不同用法.have(has)/have(has) got/there be. All that can be done__________.A.has been done B.has doneC.have been doneD.have done have,has,have been,has been在什么情况下用啊? 用have(has)been或have（has）gone填空 have/has got与have/has有什么相同?