8.2 forget doing/to do
?
  forget to do 忘記要去做某事!(未做)
  forget doing 忘記做過(guò)某事! (已做)
  The light in the office is stil on. He forgot to turn it off.
  辦公室的燈還在亮著,它忘記關(guān)了。(沒(méi)有做關(guān)燈的動(dòng)作)
  He forgot turning the light off.
  他忘記他已經(jīng)關(guān)了燈了!   ( 已做過(guò)關(guān)燈的動(dòng)作)
  Don't forget to come tomorrow.
  別忘了明天來(lái)!        (to come動(dòng)作未做)

典型例題
  ---- The light in the office is still on.
  ---- Oh,I forgot___.          
  A. turning it off  B. turn it off  C. to turn it off  D. having turned it off
  答案:C。由the light is still on 可知燈亮著,即關(guān)燈的動(dòng)作沒(méi)有發(fā)生,因此用forget to do sth.
而forget doing sth表示燈已經(jīng)關(guān)上了,而自己忘記了這一事實(shí)。此處不符合題意。











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