• 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hor\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。
五、常考的瞬间动词： 原形 1)die--be dead 2)borrow--keep 过去式 die borrow 过去分词 died borrowed left died 动词原形 动词过去分词 been dead kept been away
be dead keep
borrowed left
现在完成时之瞬间动词转变成 延续性动词
瓦房店市第十七中学 初二英语组 邱吉新
一、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
member of be in join joined
joined
joined
be a member of
been a
joined
be in
been in
• 五、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 • 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
•
•
•
二、现在完成时的结构式 has\have done 请注意第三人称：she\he\人 名...+has 三、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......
谢谢！
•See you!
五、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
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 17)Move\come\get to--be in be in been in
3)leave--be away from leave
be away from
from
4)buy--have 5)begin--be(on) buy begin bought began bought begun have be had been
6)join--be a member of join