have been的用法如图,已知E是菱形ABCD的边BC上一点,且∠DAE=∠B=80°,那么∠CDE的度数为（ ）.A.20° B.25° C.30° D35°

have been 的用法? have been的用法如图,已知E是菱形ABCD的边BC上一点,且∠DAE=∠B=80°,那么∠CDE的度数为（ ）.A.20° B.25° C.30° D35° 讲一下have been的用法,如题 have been done；have been doing;have been n(如friends);have been adj(如asleep)辨析,尤其been的解释have been done；have been doing;have been n(如friends);have been adj(如asleep)辨析,尤其been用法；完成时用法’被动语态用法 have been in, have been to, have gone to,have been at!这几个词组的用法是怎样的?如题,最好详细点!谢谢 用法,什么时候用? have been+adj的用法 have ever been 的用法? have been on的用法 have been studying过去进行?用法?have been studying是过去进行吗它意思是什么?过去进行的用法? there has/have been的用法 have been的意思及用法. have been done的用法have been done 是现在完成时的被动语态?那 They have been married for 10 years.这是被动吗?可以说被结婚? there have been 的用法there be 是有什么什么.have been是完成时.求分析there have been i gave up what might have been a maginificent career as a painter 其中have been是啥意思?我搞不懂have been有几种什么样的用法 have been in have been to have gone to用法have been in和 have been to和 have gone to的用法 been in have been to have been on的意思以及用法 have been + n.是什么用法,（thanks a lot)是have been + 名词 的用法，不是+过去分词，也不是现在分词的。 英语HAVE BEEN TO 和HAVE GONE TO 的用法