李思音和徐沛东对唱:could have ever 是个什么时态，过去完成时？什么意思

could have ever 是个什么时态，过去完成时？什么意思 Have you ever noticed 翻译 Have you ever failed? HAVE YOU EVER VIDE歌词 Have you ever seen that movie? 用"Have you ever"造句 “Have You Ever Seen Me?”说的是什么意思？ Have you ever been to Singapore Have you ever dreamed of playing for HAVE YOU EVER COME ACROSS THIS？