by後面加人稱代詞的賓格。by為介詞，介詞後面的人稱代詞用賓格。
如:The apple was eaten by me.
by：
prep.靠近在…旁邊常置於表示被動的動詞後，表示使為者表示方式
adv.經過表示保留或保存時用短暫拜訪 擴展資料
They won by a single goal after extra time.
他們在加時賽中僅踢進一球即獲勝。
They've increased the price by 50%.
他們已經把價格提高了50%。
Now I can walk to work instead of going by car.
現在我可以步行去上班，而不必開車了。
I'm always broke by the end of the month.
我總是一到月底就沒錢花了。
This situation can be influenced by a multiplicity of different factors.
當前的.形勢可能受到各種不同因素的影響。
The rate of inflation increased by 2%.
通貨膨脹率增長了2%。
