Who will i sent a message?
Who will i sent a message to?
是否需要加to呢?
Who did buy me a car?
Who did buy a car for me?
Does he get you the cake?
Does he get the cake for you?
是否需要加for呢?
Who will i sent a message?(错误)
Who will i sent a message to?(错误)
Who will I send a message to?(正确)
Who did buy me a car?(错误)
Who did buy a car for me?(错误)
Who bought a car for me? (正确) (特殊疑问词作主语时,不需要用助动词)
Does he get you the cake?(正确)
Does he get the cake for you?(正确)