What happened to her?为什么to后面要加人物宾格?

What happened to her?为什么to后面要加人物宾格? What can have happened to her What has happened\happens to her?选择 —What happened to her teeth? what happened to her mother =--- -----the ------ -----her mo welcome to为什么后面要加to I don't know what happened to her. What happened to her just now?改为同义句 what happened to him yesterday.为什么要用happened?happen可以吗 what happened to him? what happened to she What happened to Tom?