what's happened to them 's=has?

what's happened to them 's=has? what happened=what's happened吗? What's happened to them,s代表什么 what s happened to your love 歌词 happen用法what's happened to you What's happened toyou what ha 是What happened 还是what’s happened what has happened to you I hope nothing has happened to them 是what has happened to还是what has happened at what happened to your memory?和 what's happened to your car?在 what happened to you和what's happened to you的区别 what happened to sb和what's happened to sb区别