have或had后面加过去分词,过去式有什么差别?

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• 过去式组成的一般过去时 与 ."have+过去分词"构成的现在在完成时 有什么区别?请举出英语或汉语例子来说明
• had+过去式 have/has+过去分词有什么区别,都是什么时态?
• 过去式组成的一般过去时 与 ."have+过去分词"构成的现在在完成时 有什么区别?请举出英语或汉语例子来说明
• have或had后面加过去分词,过去式有什么差别?
• 英语的过去分词与过去式有什么区别回答完可以帮我回答下面的问题吗?下面的句子中哪一个对 为什么对?I have been saw it.I have been see it.I had been saw it.I had been see it.上面对的句子与I saw it.这个句子有什么区别?
• have或had后面加过去分词,过去式有什么差别?就像had run out of ,have ran out of .二者有什么区别或者说其中一个是错误的不存在的?
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• A:(you,enjoy)__the concert last night?B:very much,I (go,not)__to a concert for a long time.我的填充是A:Did you enjoy B:have not gone但是答案不对.我的想法：有last night应该表示过去式.后面for a long time应该表示现在完成时态.但是答案却是A:Had you enjoyed B:hadn't went.这是为什么呢?求回答.TKS
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• have 的过去分词是had 还是haven
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