I have opened the computer为什么不用I had opened the computer

I have opened the computer为什么不用I had opened the computer i had opened the box 和 i have opened the boxi had opened the box 和 i have opened the box 什么区别 分别啥意思 had 和 have 怎么用 I thought the window must have been opened.(been opened 两个分词在一起是否有错误?解析这部分?） i have opened up another business in GuangZhou this week When I opened the door,I (get) a big surprise The Dongying-Hainan airline for about 5 months.I have taken the flights three times.A.is open B.has opened C.has been open D.has been opened最好说明原因 No matter how I have tried,the doorA doesn't open B won't open C won't be opened D can't open I opened the door and went in.As soon as I went in I tried to back out.I backed up towards the door only to have it slammed shut. I never opened my I have ----all the photos in the drawer ,but I still can not find the one you need .A .opened up B.given away C.handed out D.looked through 选哪一个?参考答案为c.handed out I got surptised when I opened the u_____ gift mu mother sent me.I got surptised when I opened the u_____ gift my mother sent me. S(),the door opened the shop is opened. After all the presents are opened,the family will have a d_____breakfast. I shut the door of the mind,because I opened a window I would rather have a mind opened by wonder than one closed by custom I ______ his face when he opened the letter.A.would like you to seeB.would have liked you to be seenC.should like you to have seenD.should like you to see原因告诉哦我 they .here since the factory opened.A:have lived B:had lived