I have had a letter for TOM 这句 have 与had

I have had a letter from Tom.的意思? I have had a letter from tom 提问 I have had a letter from Tom.这个have had 是什么句型啊? I have had a letter for TOM 这句 have 与had i have had a letter from tom .里面的had是干什么的 I have had a letter from Tom.第一嘅have 代表?第二had 又是什麼?从句子成分分析~ 将句子I have had a letter from Tom.改成用He做主语 英语翻译Year __________ year I have had a letter from Mary on New Year's Day . 达人进!急I_______ to write a letter to John this morning ,ut I _______ no time , said TomA.hoped ; hadB.had hoped ; have C.had hoped ; had I have had a letter from Tom（改写句子)改成He做主语的句子他不是Tom 为什么这句话中有两个动词?1.He has written a letter.2.He had written a letter when I came.这里3.He will have written a letter before I come.4.He had been writing a letter for hours by the time I came.以上4句话中有HAVE的现在式 I have had a letter from Tom!我怎么感觉多了个have.这个句子可否帮忙分析下结构.改为第三人称He has had a letter from Tom.这样正确不,还有其它变法没呢?Thanks! I have had a letter from tomhave 跟 had 意思不是一样咩?为什么可以出现在一个句子的相同位置并且连着的. I had a letter from my penfriend改为同义句 Had I receivd your letter,I would have written back two days ago.为什么要用Had I 翻译：I had a letter through the post on Friday and I have been put in for an award in the Awards E 23.I was worried about him all the time,but at last I got the letter I long .A.had;been expe23.I was worried about him all the time,but at last I got the letter I long .A.had;been expecting B.were;expectingC.had;been expected D.have;been expecting 我刚刚收到弟弟蒂姆的来信i have just received a letter from my brother,tim.为什么不是i had just receive a letter from my brother,tim.我英语不好 希望细细的讲解