I left my keys behind.我忘了带钥匙了.中的behind怎么理解

改错：Where are my keys?I can’t remember Where I left it急 I left my keys on the table in my office还可以怎么说把left换掉 I left my keys behind.我忘了带钥匙了.中的behind怎么理解 I have lost my keys; I can't remember where I left it.这句话为什么去掉it I left my keys,I had to get in ( ) the windowA in B through C over D to 英语：I left my keys in the room yesterday.I had to get in through the window.get in through I left my keys in the room,so Ihad to get in rhe room t_____the wundow yesterday day. Where are my keys?Where l left it?改错题 I've __ my keys at home.为什么用left?left不是 短暂性动词吗..为什么可以用于现在完成时? i must have left the keys in the cofe. How t____!I lost my keys. 初三英语过去完成时when I got home,I realized I had left my keys at home中的过去完成时可不可以换成过去时? Why are you outside?Because I ----- my keys before you came here.是left还是 had left我也以为是had left.可练习册参考答案用的left.我就感到纳闷,以为这很特殊. 1Where are my keys?I can't remember where i left it.2Him writes an article to the 报纸 I left my I looked for my car keys.（用my提问） I+left+my+book是什么意思 I left my答案是什么