the difference between British English and American English
题目
the difference between British English and American English
不要长篇大论的给我发具体的不同啊,只要简单的介绍一下就可以.120词左右 当然是用英语
也就是英语短文啦
120词左右
答案
Use of the Present Perfect
In British English the present perfect tense is used to express an action that has occurred in the recent past that has an effect on the present moment. For example:
I’ve (I have) lost my key. Can you help me look for it? In American English the following is also possible: I lost my key. Can you help me look for it?
Other differences involving the use of the present perfect in British English and simple past in American English include already, just and yet.
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
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