托福语法技巧:动词原形后加ed变成动词的过去式(在线收听

 

  A规则动词的过去式是在动词原形后加 ed构成的:

  动词原形:work

  过去式:worked

  以e结尾的动词只加d:

  动词原形:love

  过去式: loved

  对所有人称,均无词形变化:

  I worked you worked he worked等

  规则和不规则动词的否定式均由 did not/didn’ t+动词原形构成:

  I did not/didn’t work you did not/didn’t work等疑问式则均由 did+主语+动词原形构成:

  did I work? did you work?等

  否定疑问式:

  did you not/didn’t you work?等

  B拼写注意事项

  加ing时最后一个辅音字母双写的规则(参见第165节)也适用于加ed的场合:

  admit,admitted

  stop, stopped

  travel,travelled

  以y结尾的动词,y前为辅音字母时,在加ed之前要把y变为i:

  carry, carried

  try, tried

  但y前面是元音字母时则不变:

  obey, obeyed

  本文由在线英语听力室整理编辑。

 

  原文地址:http://www.tingroom.com/listen/tuofu/241843.html