普力健葡萄糖氧化酶:难改啊``````````````

涉及到瞬间动词和延续动词的问题。

瞬间动词的动作是发生在一瞬间的，不能使用持续状态。需要用到持续状态的时候就要换成相应的延续动词，否则就改成一般过去时：

A. “come”来，是瞬间动词。原句的意思是：他不停地来了3个小时。听起来是不是很怪？有两种改法：
瞬间：He came 3 hours ago.他三个小时之前就来了。
持续：He has been here for 3 hours. 他来到这里已经三个小时了。

B. “wait”是延续动词，只能用持续状态。原句是个病句，不能用“since”，改为：
The girl has waited for two years .女孩等了两年了。
或者：
The girl has been waiting for two years.女孩等了两年了，她还会等下去。
The girl waited for two years.女孩等了两年了。

C.“die”瞬间动词，原句：那位老人死来死去10年了。应改为：
瞬间：The old man died ten years ago. 那位老人十年前就死了。
持续：The old man has been dead for ten years. 那位老人死了十年了。

D. “buy”瞬间动词，原句：那本书我买来买去两个月了。改为：
瞬间：I bought the book two months ago.我两个月前买了那本书。
持续：I have had the book for two months.我拥有这本书已经两个月了。

瞬间动词和延续动词有很多，平时要注意区分和收集。

a . he has been here for 3 hours
b. the girl has waited for 2 yeaes
c. the old man has benn dead for 10 years
d. i bought the book 2 months ago?

楼主,你好，正确修改是:

A) He has been here for 3 hours.

B)The girl has been waiting for two years

C)The old man has been dead for ten years.

D)I bought the book two months ago.