I have lost my key;I can't remember where I forgot it改错

i must have lost my key~不用have行不? I have lost my key;I can't remember where I forgot it改错 i lost my key和i have lost my key有什么区别?分别是什么时态和意思有什么不同? I lost some(key) I have to wait for my mother,for l have lost the key of the door哪里错了 What has happened?What has happened?---I have lost my key and can't open the door.为什么不能用What happened?---I lost my key and i can't open the door.两者的区别是什么? I have never lost my heart i have lost my heart for you? Time (Have I Lost My Mind?) 歌词 I have lost my new English dictionary have i lost my faith in you? I can't find the key to my office,I( )have lost it on my way homeA would B should C must D ought to U___ ,i found my key lost in my office when i got home last night I am a( )I have left my key at home What did you do with your car?I lost my key,so I have to( )it in the park.A.lock B.repair C.leave D.pass What-------? I --------my key and can't open the door.A.happened;lostB.has happened;lostC.happens;have lostD.has happened;have lost选哪个?为什么? I have lost my life since I met you. I have lost my true love what can i do?