borrow变为延续性动词是什么？变延续性动词前面加be表示什么？

borrow变为延续性动词是什么？变延续性动词前面加be表示什么？

borrow --  kept

短暂性表达                     延续性表达  

have borrowed             have kept (keep)  

have bought                 have had (have)

have left                       have been away (be away)  

have begun                  have been on (be on)  

have opened               have been open

have joined                  have been in (be in)

延续性动词表示能够延续的动作。如：study, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。
延续性动词表示的动作不但可以延续，而且可以产生持久的影响,又叫非点动词。常见的这类动词有：be，have，keep，know，study，lie，live，read，sing，sleep，stand，stay，wait，walk，watch等。延续性动词的用法很广，但常见于现在完成时中的句子中，且常与for，how，long，since等引导的表示一段时间的状语或状语从句连用。
它可用于现在完成时态,但由于动作是瞬时间完成的所以不能与for或since引出的时间状语连用，又叫点动词.英语中常见的非延续性动词在完成时态中可改为相应的表示延续性的动词或短语,这时可与表示一段时间的的状语连用。

奉贤精锐英语老师为你解答：
borrow -- kept

短暂性表达 延续性表达

have borrowed have kept (keep)

have bought have had (have)

have left have been away (be away)

have begun have been on (be on)

have opened have been open
have joined have been in (be in)

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