Question

20．他離開實(shí)驗(yàn)室已經(jīng)不止一小時了．
He has been away from the lab for over/more than an hour．．

Answer 1

分析 He has been away from the lab for over/more than an hour．

解答 答案：He has been away from the lab for over/more than an hour．這是一個陳述句，離開這個動作發(fā)生在過去，持續(xù)了不止一個小時了，用現(xiàn)在完成時have/has+過去分詞，主語是三單he，故has，離開leave是一個短暫性動詞，這里是和一段時間for over/more than an hour不止一小時連用，需換成be away from表狀態(tài)，be的過去分詞是been，實(shí)驗(yàn)室the lab，故答案是He has been away from the lab for over/more than an hour．

點(diǎn)評 這里是現(xiàn)在完成時，本題要注意要短暫性動詞轉(zhuǎn)換成持續(xù)性動詞，這里是用be+形容詞或副詞替換短暫性動詞． 
  die→be dead，leave→be away（from），finish/end→be over，begin/start→be on，open→be open，close→be closed，come here→be here，come back→be back，marry→be married，fall asleep/get to sleep→be asleep，return→be back等