had looked这类短语是过去完成时么?
had looked这类短语是过去完成时么?
had been则是过去的过去,是过去完成时,
I've already had lunch过去完成时,这句短语中请问怎么运用理解啊?
had been married for 50 years 那意思不是现在完成时吗?怎么(had)是过去完成时?
had been broken ,had broken 哪个是过去完成时呢 怎么区分
过去完成时的构成过去完成时是由“had +动词的过去分词”构成,但是为什么说had通常用于任何人称?had到底怎么变化?
have done-- 现在完成时 理解这个短语已经做了什么吗?那么过去完成时had done---该怎么去理解呢?
有关过去完成时的疑问过去完成时的结构是 主语+had+过去分词她说她已经吃饭了she said that she had
had done 是过去完成时,have done是现在完成时,那have been和had been呢?be不是动词呀
I waited until he had finish his homework中,为什么until后面是过去完成时,
we cleaned up as soon as guests had 后面是过去完成时
下面句子为什么用的是被动语态was finished而不是过去完成时had been finished