been+doing是什么时态

毛物皆4296英语中“been”的用法,重点是怎么区分什么时候加什么时候不加? -
邢饰念19132137600 ______ ＂been＂ 是“be＂ 的过去分词形式,多用于完成时态中,常用的有以下几种形式:have或hasbeen(现在完成时,had been(过去完成时态).例如:1.自从去年我就一直在这个城市.英语是:Since last year I have been in this city all the time. 2. 在上学期期末之前我就在这个班. 英语:By the end of last term I had been in this class. 这里的been 都是存在之意. 谢谢!

毛物皆4296been 是be动词的什么形式,being 又是be动词的什么形式 -
邢饰念19132137600 ______ been是过去分词,就是done的形式 being是现在分词,就是doing的形式

毛物皆4296what have u been doing的been是什么时态? -
邢饰念19132137600 ______ 整句话的时态是现在完成进行式 其实应该问doing是什么时态,been一直都是用于完成式中,例如have been had been 你过去一直在做什么 what have u been doing!

毛物皆4296现在完成时什么时候加been,什么情况加 -
邢饰念19132137600 ______ 您好!现在完成进行时的结构是:主语+ have/ has been + doing sth . 如: He has been learning English for three years . 当be 动词需要表示完成时就用: 主 + have / has been + 其它 .如: He has been here for two days . 望采纳 !谢谢!

毛物皆4296Have been doing的用法和意义是什么? -
邢饰念19132137600 ______ have been doing 和 have done 都是现在完成时态,但在用法上有以下区别:have been doing:表示从过去某时开始一直在做某事,强调动作的持续性或重复性.have done:表示过去某时完成了某事,强调动作完成或结束后的状态.例句:I ...

毛物皆4296英语语法中过去将来完成进行时是什么意思?? -
邢饰念19132137600 ______ I would have finished my experiment if I had taken the certain class.你是指这种情况吗?其实是没有你说的这个时态的,这是虚拟语气.

毛物皆4296They can't have been doing thier homework.have been 是现在完成时,但是后面do为什么要变成doing?They can't have been doing thier homework.这句话 ... -
邢饰念19132137600 ______[答案] 现在完成时结构 have/has+P.P. 现在完成进行时结构 have/has +been+doing 此句在现在完成进行时 前加上情态动词,can't have been doing 表示一种语气较肯定的推测.意为那时不可能在做某事

毛物皆4296英语单词been有什么用法 -
邢饰念19132137600 ______ 1.have been to (a place)\＂曾去过某地\＂.可视作瞬间性动词reach, arrive, get的转换.如: We have already been to the Great Wall twice.我已经去过两次长城了. Have you just been to the room? 你刚才去房间了吗? 2. have been in/at (a place...

毛物皆4296be+doing是什么语法结构 -
邢饰念19132137600 ______ be doing 是进行时的语法结构. am/ is/ are doing 是现在进行时 was/ were doing 是过去进行时

毛物皆4296have been doing having been doing 什么区别 -
邢饰念19132137600 ______ having done本来就很少用,用也是用在已结束的动作上 After turned off the lights, he left. have been doing是说一直在做某事 因此,很少有说having been doing的. Though having been always trying hard, they haven't made any progress yet. 尽管...