3.几组易混淆的介词 

 A. “在...之后” in + 一段时间(用于一般将来时)

   after + 一段时间(用于一般过去时)  after + 一点时间(常用于一般将来时) 

  如:The baby stopped crying after half an hour.   

   The baby will stop crying in half an hour.  They will visit their teacher after Friday.                    

 B. for +一段时间   since +过去的一点时间

  这两者均用于现在完成时,具体在时态部分,我会继续向同学们讲解。    

 C. be made of "用……制成"  be made in “由某地制造”be made by somebody “由某人制成”        

 D. in, on, at表时间    in “在某月(季节、年)等” eg:in 1996, in January, in summer

   固定词组:in the morning, in a week,in a minute,in time, in the end

  on "用于指具体的某一天或专指某一天上午、下午或晚上等"

   eg:on Christmas Day, on the night of February 16

  at “用于具体时刻前和某些固定词组中”

   固定词组:at seven, at the moment, at night, at last, at first, at noon, at times, at once, at this time of the year, at the beginning of, at the end of this month, at the same time 注意:在表时间里,下列情况下一般不用介词。词组里有:next, last, this, that, tomorrow, yesterday, one, every, all 以及the day before yesterday和the day after tomorrow 前不用介词 。 如:不能说 in tomorrow ,只能说 tomorrow 在明天         

 E. except +宾格/doing something "除…之外” (不包括本身) 

  Everyone is at school today except Lin Tao. (同义句转换) =Only Lin Tao isn't at school today.        

 F. “用” 通过交通工具 by plane

  用语言 in English 通过媒介 on /over the telephone,  on /over the radio,  on TV

用工具手段 with a pen, with one's hands           

 G. between “在~和~(两者)之间”

  between...and...,  between the two... among 在...之间(三者或三者以上) 

eg.Sue spent over two hours ___ her homework yesterday evening.  A.on   B.with    C.at   D.over

二、连词       

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