现在完成时中瞬间动词和和延续性动词的转换

现在完成时有一个用法表示动作从过去开始，一直持续到现在，且可能继续，这时候要和表示时间段的时间状语连用，因此相应的动词也需要使用延续性动词。

例：

①I have bought this book for two weeks. ×

I have had this book for two weeks. √

注：因为买(buy)这个动词是瞬间动词，因此与for two weeks这个时间段连用的时候需要转换成延续性动词have。

②( )The train for a long time.

has left B. has away C. has been away D. left

解题思路：时间标志词for用于现在完成时，先排除D，现在完成时谓语结构是have(has)+动词过去分词，排除B，因为时间状语是时间段，所以动词需要有延续性，故选C。

答案：C

※常见的瞬间动词与延续性动词的相互转换：

borrow → keep buy → have

leave → be away marry → be married

die → be dead finish → be over

join → be a member of begin/start → be on

open → be open close → be closed