Question

Mr. Bo _____ for half a month. He’ll come back in two months.

A．left

B．leave

C．has left

D．has been away

Answer 1

D

試題分析：句意：Bo先生已經離開了半個月了，兩個月之后他將回來。句中有表一段時間的狀語for half a month，謂語動詞要有延續(xù)性，leave 改為be away,故選D.
點評：延續(xù)性動詞與表示一段時間的時間狀語連用。非延續(xù)性動詞向延續(xù)性動詞的轉變熟記一下幾個：
leave --- be away,  borrow --- keep,  buy --- have,  begin/start --- be on,      die --- be dead, leave --- be away from, fall asleep --- be asleep