短暂性动词与延续性动词的一一对照（初中）

come-be in start-be on finish-beover join-bein borrow-keep buy-have leave be away die-be dead
我当过英语老师,都是正确的

瞬时性动词没有ing形式
瞬时动词在现在完成时中要注意：
e.g. I bought this book two weeks ago.
完成：I have had this book for two weeks.

buy-have had
borrow-have kept
begin-have been on
~~~~~and so on 具体的问你们英语老师吧