at 在.地点; 在.时刻;
例句:He were already waiting at the gate when I got there.
当我到达那里时,他已经等候在门口了.
of 用.做成的;.的;
例句:Mr.Brown is a friend of mine.
布朗先生是我的朋友.
for 为了;因为;给
例句:We must start early,for it will take two hours to drive to the airport.
我们得早点动身,因为开车去机场得花两个小时.
in 在.里;在.方面;在.期间;
例句:The telephone is in my room.
电话在我的房间里.
on 在.上;在.的时候;沿着
例句:They talked on until midnight.
他们一直谈到深夜.
with 与.一起;带着.;在.一边;
例句:He lives with his son.
他和儿子居住在一起.