【正文】
示時間段的時間狀語連用。t left here for 3 years. I haven39。 例 :The old man died 4 years ago. The old man has been dead for 4 years. It is 4 years since the old man died. Four years has passed since the old man died. He joined the Party 2 years ago. He has been in the Party for 2 years. I bought the book 5 days ago. I have had the book for 5 days. 補充練習: 1. When he arrived at the bus stop, the bus ________ for 20 minutes. A. has left B. had left C. has been away D. had been away 2. I ______ the League for 5 years so far. A. joined B. have joined C. have been in 3. The factory ________ since the February of 1988. A . has been open B. has opened C. was open