一般现在时与进行时

一般时通常用来描述事情的永久状态或常常发生的事。例如:

  ◆ SIMPLE PRESENT Sandy PLAYS well with her friends.

  ◆ SIMPLE PAST Sandy PLAYED well with her friends yesterday.

  ◆ SIMPLE FUTURE Sandy WILL PLAY well with her friends tomorrow.

 

进行时表示动作正在进行:

  ◆ PRESENT PROGRESSIVE Sandy IS PLAYING soccer.

  ◆ PAST PROGRESSIVE Sandy WAS PLAYING soccer yesterday.

  ◆ FUTURE PROGRESSIVE Sandy WILL BE PLAYING soccer tomorrow.

 

上面的例子表示说Sandy 正在PLAYING soccer ,而一般现在时:Sandy plays soccer,则是强调Sandy 比较经常或者她知道如何plays soccer 。在一般的定义中我们通常避免使用进行时而使用一般时:

  ◆ Wrong: Cherenkov radiation is light that particles ARE EMITTING when they ARE TRAVELING faster than the effective speed of light in any medium.

  ◆ Right: Cherenkov radiation is light that particles EMIT when they TRAVEL faster than the effective speed of light in any medium.

 

表达一般状态的动词一般不用进行时,例如know or signify:

  ◆ Wrong: This inscription IS SIGNIFYING the emperor’s birth.

  ◆ Right: This inscription SIGNIFIES the emperor’s birth.

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练习册:一般现在时与进行时

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