beat against与knock against的区别

请问beat on和beat against的区别,什么时候用哪个 Protest与 protest against的 区别 struck、beat、knock的区别 go against与be against有什么区别 against fight against和struggle with/against的区别 fight with与 fight against区别 在英语中 beat.hit.against.都 beat one's head against the wall beat one's head against a wall fight&fight against使用时的区别? play with 和 play against 的区别