wake him up和wake her up
區別就是兩者的人稱代詞賓語不一樣,具體的不同如下
wake him up中文意思是把他叫醒
She gave him a pinch on the arm to wake him up.
她擰一下他的胳膊把他喚醒。
wake her up中文意思是把她叫醒
She is asleep but I will wake her up.她睡着了,可是我要把她弄醒。
     wake him up 和wake her up 的區別僅僅在於作賓語的代詞不同:him 是男性,而her 是女性,它們的中文意思分別是:“把他叫醒” 和 “把她叫醒”。
     wake up是個短語動詞,它可以是及物的,也可以是不及物的。
      作及物動詞用時,意思是:把某人叫醒,如果賓語是名詞,既可以放在make和up之間,也可以放在up之後如果賓語是代詞,則只能放在make和up之間。例如:Every morning the mother has to wake up her daughter. / His daughter wants to sleep for longer time. so he won't wake her up until 7:00 o'click. 
      作不及物動詞用時,意思是:醒來。例如:He usually wakes up at 6:30 in the morning. 
   回答完畢。
wakes him up 叫醒他
wakes her up 叫醒她
wake sb. up 叫醒某人,喚醒某人
him 是 he 的賓格,意思是 ”他“。
her 是 she 的賓格,意思是”她“。
以上是所有回答,希望幫到您。