短暂性动词转换为延续性动词.①arrive at/in sw.get to/reach sw.come/go/move to sw.→ be in sw./at school/at home/on the farm/be here/be there1) He got to Beijing five minutes ago.He _______ _______ _______ Beijing for _______ _______.2)

短暂性动词转换为延续性动词.①arrive at/in sw.get to/reach sw.come/go/move to sw.→ be in sw./at school/at home/on the farm/be here/be there1) He got to Beijing five minutes ago.He _______ _______ _______ Beijing for _______ _______.2)
短暂性动词转换为延续性动词.
①arrive at/in sw.get to/reach sw.come/go/move to sw.
→ be in sw./at school/at home/on the farm/be here/be there
1) He got to Beijing five minutes ago.
He _______ _______ _______ Beijing for _______ _______.
2) I moved to the USA last year.
I _______ _______ ________ the USA since ________ ________.
3) I went home yesterday.
I ______ _______ _______ home for _______ ________.
4) They came here last week.
They _______ _______ here since _______ ________.
②come/go back,return → be back come/go out → be out
1) He came out two years ago.
He ________ ________ _______ for ________ ________.
2) We return to Fuzhou yesterday.
We _______ _______ ________ to Fuzhou since _________.
③become → be
1) I became a teacher in 2000.
I _______ ________ a teacher for ________ ________.
2) The river became dirty last year.
The river ________ ________ dirty for _______ ________.

短暂性动词转换为延续性动词.①arrive at/in sw.get to/reach sw.come/go/move to sw.→ be in sw./at school/at home/on the farm/be here/be there1) He got to Beijing five minutes ago.He _______ _______ _______ Beijing for _______ _______.2)
你好,很高兴回答你的问题,正确答案为：
1 has been in five minutes
2 has been in last year
3 have been at one day
4 have been last week
1 has been out two years
2 has been back yesterday
1 have been 14 years
2 has been one year

现在完成时是中学英语语法的重点之一。它表示过去发生的某一动作或存在的状态，一直持续到现在，并可以和以for或since引导的表示一段时间的状语连用，也可以用在以“how long”提问的句子中，句子中的谓语动词一般为延续性动词。但是，有些动词所表示的动作是短暂的，这类动词叫做非延续性动词。如：come, go, reach, arrive, leave, borrow, buy, join, di...

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现在完成时是中学英语语法的重点之一。它表示过去发生的某一动作或存在的状态，一直持续到现在，并可以和以for或since引导的表示一段时间的状语连用，也可以用在以“how long”提问的句子中，句子中的谓语动词一般为延续性动词。但是，有些动词所表示的动作是短暂的，这类动词叫做非延续性动词。如：come, go, reach, arrive, leave, borrow, buy, join, die, begin, start, finish等。在现在完成时的句子中，非延续性动词作谓语动词时，不能和表示一段时间的状语连用。
下面对其概念进行详细分析：
延续性动词的用法特征
　　1.延续性动词可以用于现在完成时，其完成时态可与表示"段时间"的状语连用。表示"段时间"的短语有：for two years, during the past three years, since last year, how long等。如：I have learned English since I came here.自从我来到这儿就学英语了。
　　2.延续性动词不能与表示短暂时间的"点时间"状语连用。如：It raind at eight yesterday morning.(误) rain为延续性动词，而at eight表示"点时间"，前后显然矛盾。如果用延续性动词表示一瞬间的动作，可以借助come, begin, get等终止性动词来表示。上句可改为：It began to rain at eight yesterday morning.(正)又如：
-When did you get to know Jack?　-Two years ago.　
-Then you've known each other for more than two years.　-That's right.
5、终止性动词的用法特征
　　1.终止性动词可用来表示某一动作完成，因此可用于现在完成时。如：
The train has arrived.火车到了。
Have you joined the computer group? 你加入电脑小组了吗？
　　2.终止性动词表示的动作极其短暂，不能持续。因此，不可与表示一段时间的状语连用(只限肯定式)。如：
(1)他死了三年了。 误：He has died for three years.
正：He has been dead for three years. 正：He died three years ago.
正：It is three years since he died. 正：Three years has passed since he died.
(2)他来这儿五天了。 误：He has come here for five days.
正：He has been here for five days. 　正：He came here five days ago.
正：It is five days since he came here. 正：Five days has passed since he came here.
　　(1)、(2)句中的die、come为终止性动词，不能与表示"段时间"的状语连用。那么，应如何正确表达呢？可以采用下面的四种方法：
　　(1)将句中终止性动词转换为相应的延续性动词，如上面两例中的第一种正确表达方式。下面列举几例：leave→be away, borrow→keep, buy→have, begin/start→be on, die→be dead, move to→live in, finish→be over, join→be in/be a member of, open sth.→keep sth. open, fall ill→be ill, get up→be up, catch a cold→have a cold。go to-been to/gone to/been in ，come/arrive/get/reach/move---be in/at ，put on ----wear，end/finish-----be over。
　　(2)将句中表示"段时间"的状语改为表示过去确定时间的状语，如下面两例中的第二种正确表达方式。
　　(3)用句型"It is+段时间+since..."表达原意，如上面两例中的第三种正确表达方式。
　　(4)用句型"时间+has passed+since..."表达原意，如上面两例中的第四种正确表达方式。
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