题目
比较since和for
提问时间：2021-01-30
答案
Since 用来说明动作起始时间,而for用来说明动作延续时间长度.
比如说 ：I have lived here for more than twenty years.
I have lived here since I was born..
My aunt has worked in a clinic since 1949.
Some new oilfields have been opened up since 1976.
I have known Xiao Li since she was a little girl.
My brother has been in the Youth League for two years.
I have not heard from my uncle for a long time.
但是也并非有for 作为时间状语的句子都用现在完成时.
I worked here for more than twenty years.
(我现在已不在这里工作.)
I have worked here for many years.
(现在我仍在这里工作.)
比如说 ：I have lived here for more than twenty years.
I have lived here since I was born..
My aunt has worked in a clinic since 1949.
Some new oilfields have been opened up since 1976.
I have known Xiao Li since she was a little girl.
My brother has been in the Youth League for two years.
I have not heard from my uncle for a long time.
但是也并非有for 作为时间状语的句子都用现在完成时.
I worked here for more than twenty years.
(我现在已不在这里工作.)
I have worked here for many years.
(现在我仍在这里工作.)
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
最新试题
热门考点
- 1How is the weather tomorrow?The radio ___ the snow will stop.A.says B.tells C.talks D.speaks
- 2大于8分之1又小于7分之1的分数有哪些?
- 3in summer we can_electricity by using fans instead of air-conditioners.a.get b.make c.save d.help
- 4Kw=c(OH-)×c(H+)=10^-14,这里的OH-和H+指的是水电离出的还是溶液全部的?
- 5有一筐橘子，7个一数还多4个，五个一数又少3个，3个一数恰好数完，这筐橘子至少有多少个．
- 6u '+4u=e怎么求它的通解
- 70.8% 0.4% 这样有0的小数用英语怎么读?是o point eight percent吗?
- 8建筑结构类型与结构形式有何区别?
- 9热带雨林的主要降水形式是
- 10已知△abc中,∠acb=90°,m为ab的中点,∠pmq=90°,试说明:pq的平方=ap的平方+bq的平方