look after him 为什么不用“动代副”的结构?

look after him 为什么不用“动代副”的结构? let him look after this cat.为什么用him? he was left alone,with no one to look after him.为何不用 none my father is ill ,have to look after/look for him at home.哪个对?应该用look after 还是look for.为什么? Who looks after Rose 为什么这里要用looks而不用Who does look after Rose? Let is look after him.的意思 句子who dose the old man looking after?为什么不是不用look after而用looking after She look after David at home.请翻译成汉语,为什么after.为什么不用at,for,或in. take good care of 为什么用good不用well look after well为什么用well不用good. “He will look after my bird while I go away为什么用while不用when Let him ( ) after them very well look 还是looks Who _____(look) after the old man when his arm was broken?为什么 不用was looking 而是looked （英语） the twins are new here,please ______.a.look after themb.look them afterc.look him afterd.look after him so we went to have a look at him.句子成分分析.为什么句子里的 look 不用变形.之前不是有谓语了吗 关于非谓语的主被动例：With so many orphans to look after ,the charity organizition calls for more donations.为什么不用to be looked after 2.It is six months_____I last saw him.A.after B.for C.with D.since 为什么用since 而不用after please look after her 为什么用her “我不得不照顾她”用英语怎么说?是不是“I have to look after her”?可是“her”是形容词性物主代词,“look after”是动词,动词后面不是用宾格吗?这里为什么用“her”而不是“him”?