瞬间动词用于完成时态不能与一段时间状语连用，须转换成持续性动词。 1。用相应的延续性动词替换的有：
buy———have borrow---keep put on—---wear
catch/get a cold———have a cold
come/go/become-—-be 等。
eg。 1.We have had the TV set for 3years。
2。I have kept the book for 2 weeks。
语文天地网
2。转换成be+名词的有：
系统检测join the army-——-be a soldier
join the Party—--—be a Party member
go to school——--be a student 等.
eg。 1.He has been a soldier for 5 years。
2She has been a student for 2 months.
3。转换成be+adj/adv.
die—水产品包装
设计be dead finish-be over begin--—be on leave-—-be away move-—--be out of
put on——-be on open---be open close-——be closed
fall asleep—-——--be asleep 等。
eg。 He has been dead for 5 years.
4.转换成be+介词短语
go to school—-——be in school
假如没有灰尘教学设计
回鹘式蒙古文join the army---be in the army 等。
eg. 1.She has been in the army for 2 years.
2.He has been in school for 9 years。
5.通过去掉短语中的结束性动词
get to know—-—know
begin to study-—-study
come to work————work
eg. 1.We have known each otherfor 10 years.
2。He has study Chinese for 2years.
*瞬间动词完成时的否定式已成为一种可延性状态，因此可以和表示一段的时间状语连用。
eg。 1。I haven’t heard from her for 6 months.
反倾销论文
2.I haven’t bought anything for 2 months。
leave —-- be away, borrow -—— keep, buy -—— have, begin/start —-- be on, die -—- be dead， finish ——— be over, join —-— be in+组织机构， be a member of+组织机构， open sth ——- keep sth open, fall ill —-— be ill, get up—-—be up， come here ——- be here， go there --- be there， become -—— be, come back -—— be back， fall asleep —-- be asleep， get to/ arrive/reach -—- be （in）, leave —-- be away from， get to know ——- know， go （get) out →be out， put on→ wear;catch a cold →have a cold，get married-—-be married等。
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