现在完成时之瞬间动词转变成延续性动词
1、for\since:
1)for+一段时间，常常可以发现for+数字，for three months for a long time for many years
2)Since+时间点，常常可以发现
a. since+月份，年份，表示时间的几点 since September since 1990 since 7 o’clock
b. since+一段时间+ago； since two years ago since ten months ago
c. since+ last+.... since last month since last year
2、现在完成时的结构式 has\have done 请注意第三人称：she\he\人名...+has
3、当句子为肯定句，且居中出现for\since的时候，句中的时态要用现在完成时，且句中的动词要用延续性动词。
当句子为否定句时，句中的动词可以为瞬间动词，表示某个动作不发生的状态已经持续了......
4、在有for\since的现在完成时的从句中，如何将瞬间动词转换成延续性动词
以borrow——keep为例子
They borrowed it last week. They have kept it since last week.
分析：
1）我们已经知道现在完成时的标志就是has\have done，因此第一步就是看主语，主语时They，我们选择have done。
2）因为borrow——keep.而keep——过去分词：kept，因此，have borrowed就需要改成have kept.
3）Since后面只能接时间点，而last week就是一个时间点，因此，since后面直接填写last week。
5、常考的瞬间动词：
原形 过去式 过去分词 动词原形 动词过去分词
1. die--be dead die died died be dead been dead
2. borrow--keep borrow borrowed borrowed keep kept
3. leave--be away from leave left left be away from been away from
4. buy--have buy bought bought have had
5. begin--be(on) begin began begun be been
6. join--be a member of join joined joined be a member of been a member of
be in join joined joined be in been in
7.become--be become became become be been
8.Open\close--be open open opened opened be open been open
9.finish--be over finish finished finished be over been over
10.put on--wear put put put wear worn
11.catch a cold--have a cold catch caught caught have had
12.go to--be in go went gone be in been in
13.get to know--know get got got know known
14.Arrive in\at--be in arrive arrived arrived be in been in
15.Move\come\get to--be in
16.go out--be out go went gone be been
Move\come\get to--be in be in been in
举例
Mr. Smith came to this school in September.
Mr. Smith ___has____ ____been____ at this achool_____since___ September.
分析：
1, come--came--come
2, 本来应该是填写has come to，但是come to要转换成be in
3, 而be的过去分词为been因此我们填写的内容为 has been in
4，因为句子中已经有了at，所以我们只需要填写has been
本文档为【现在完成时难点瞬间动词转换成延续性动词】，请使用软件OFFICE或WPS软件打开。作品中的文字与图均可以修改和编辑，
图片更改请在作品中右键图片并更换，文字修改请直接点击文字进行修改，也可以新增和删除文档中的内容。
该文档来自用户分享，如有侵权行为请发邮件ishare@vip.sina.com联系网站客服，我们会及时删除。
[版权声明] 本站所有资料为用户分享产生，若发现您的权利被侵害，请联系客服邮件isharekefu@iask.cn，我们尽快处理。
本作品所展示的图片、画像、字体、音乐的版权可能需版权方额外授权，请谨慎使用。
网站提供的党政主题相关内容(国旗、国徽、党徽..)目的在于配合国家政策宣传，仅限个人学习分享使用，禁止用于任何广告和商用目的。
浙公网安备 33021202002483