延续性动词和瞬间动词的区别

uy是瞬间性的.改完成时句子的话就改成have had
比如说I bought this book two days ago
变成I have had this book for two days
未来的影响?这个可以关系到延续性?不太了解、.
while后面加延续性的,when的加延续不延续都行,不过貌似加不延续的比较多吧.
希望对你有帮助.