Question

20．他離開(kāi)實(shí)驗(yàn)室已經(jīng)不止一小時(shí)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(gè)陳述句，離開(kāi)這個(gè)動(dòng)作發(fā)生在過(guò)去，持續(xù)了不止一個(gè)小時(shí)了，用現(xiàn)在完成時(shí)have/has+過(guò)去分詞，主語(yǔ)是三單he，故has，離開(kāi)leave是一個(gè)短暫性動(dòng)詞，這里是和一段時(shí)間for over/more than an hour不止一小時(shí)連用，需換成be away from表狀態(tài)，be的過(guò)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(píng) 這里是現(xiàn)在完成時(shí)，本題要注意要短暫性動(dòng)詞轉(zhuǎn)換成持續(xù)性動(dòng)詞，這里是用be+形容詞或副詞替換短暫性動(dòng)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