He posted the letter two hours ago.改为被动语态

He posted the letter two hours ago.改为被动语态 A letter( posted ),he hurried to the shop for some shopping.我开始选的是（having posted）,答案给的（posted）, 并帮我分析一下其他的选项为什么错Henry always forgets things he has done.yesterday he forgot ___and looked for it everywhereA to post the letter B to have the letter posted C to have posted the letter D having posted the letter I posted the letter （改为被动语态） Ted has posted the letter.(改为否定句） Have they posted the letter yet改被动 Have they posted the letter yet?改为被动语Have they posted the letter yet?改为被动语态 Who do you think it is that he will have ______ the letter?A.to post B.posted C.post D.postin He wrote the letter last week and posted it three days ago.改成一般现在时态和现在完成时态.要加时间状语! He had already posted the letter ____five yesterday.A.on B.at C.by D.for 此题应该选C, I posted the letter today in order that he would get it tomorrow.这里的would为什么是过去式呢,而不是will呢? The letter ____three days ago and it ____yesterday.A.was posted,arrivedB.had been posted,was arrived He has posted the letters already.改为被动语态 Have they posted the letter yet?改为被动语态如题 i cannot remember if i posted the letter 为什么后面用过去式而前面不用 I.would.just.as.soon.you.posted.the.letter.为什么post用过去时 A letter_ ,he hurried to the shop for some shopping.posted是答案.had been posted 为什么不对啊 “He had already posted the letter by five yesterday.”为什么要用介词by?这是一道选择题：选项有A.on B.at C.by D.for我选择的是B,却不知道错误原因,希望告知!