Have加过去分词和had加过去分词有什么不同
have+过去分词和have been+过去分词的区别 have+过去分词是“现在完成时”.have been+过去分词是“现在完成时的被动语态”.eg：I have done it.我已经做完了.It has been done by me.它已经被我做完了.懂了吗？have been+过去分词属于语态
have +过去分词 表示曾经吗？
have后面加过去分词代表什么意思
have的过去分词是had还是haved 21.7 情态动词 have 过去分词 分类：英语学习1)may(might)have done sth，can(could)have done sth 表示过去，推测过去时间里可能发生的事情.Philip may(might)have been hurt seriously in the car accident.Philip can(could)have been hurt seriously in the car accident.2)must have done sth，对过去时间里可能发生的事情的推测，语气较强，具有\"肯定\"，\"谅必\"的意思.Linda has gone to work，but her bicycle is still here.She must have gone by bus.3)ought to have done sth，should have done sth本应该做某事，而事实上并没有做.否定句表示\"不该做某事而做了\".You ought to(should)have been careful in this experiment.He ought not to have thrown the old clothes away.（事实上已扔了.）ought to 在语气上比should 要强.4)needn't have done sth 本没必要做某事I dressed very warmly for the trip，but I needn't have done so.The weather was hot.5)would like to have done sth 本打算做某事I would like to have read the article，but I was very busy then.21.8 should 和ought toshould 和ought to 都为\"应该\"的意思，可用于各种人称。.
“have+动词的过去分词”是什么结构 现在完成时（Present perfect）过去发生并且已经完成的动作对现在造成影响或后果，过去某一时间开始并一直持续到现在的动作或状态，基本结构：主语+have/has+动词的过去分词(done)①肯定句：主语+have/has+动词的过去分词+宾语.②否定句：主语+have/has+not+动词的过去分词+宾语.③一般疑问句：Have/Has+主语+动词的过去分词+宾语.④特殊疑问句：特殊疑问词或词组+一般疑问句（have/has+主语+过去分词+其他）定义：（1）强调动作是过去发生的（2）强调对现在的影响或结果（3）在过去不确定的时间里发生的动作，但是结果对现在有影响.如：I have spent all of my money.(含义是：现在我没有钱花了.)Jane has laid the table.(含义是：现在桌子已经摆好了.)I have read the novel.我看过那本书了.(已看完)
