had been doing是主动还是被动

had been doing是主动还是被动 had been doing是什么是时态? had been looking forward后面加to do 还是doing? had been doing 是什么时态? had been doing是什么时态 had been doing是什么时态 If there had not been 改成 had not there been 是had not there been 还是had there not been? That后面的是什么从句呀?We were told that the meeting had been canclled.我们被告知回忆已被取消.That后面的还是宾语从句吗?如果是主动的They told us that the meeting had been canclled.that后面的肯定是宾语从句, had been doing 和had been done有什么差别 had been doing 和had been done有什么差别? 英语时态区分have done .have been doing.had done.had been doing.有什么区别. had been doing 和 had done的区别 had been doing是什么时态,从过去持续的现在?还是过去的过去?还是别的什么 —Has Tommy finished his homework yet?—I have no idea; he ---it this morning.A.was doing B.had been doing C.has done D.did 选A 还是B 是最好的答案 i has been doing 还是i have been doing have been doing,had been doing,will have been down是什么 我知道have/has+been+过去分词.是被动语态...那么had+been+过去分词.是被动语态吗?已经被人们所关注。用have/has+been+过去分词好？还是用had+been+过去分词好？ I found everything changed 事情改变是被动还是主动?I found everything had changed.