现在完成时(改变瞬间动词)
题目
现在完成时(改变瞬间动词)
我们今天进行句型练习.要将“join、began、catch”这三个瞬间动词用到现在完成时的句子里,(当然是要改掉的)麻烦告诉我这些瞬间动词怎么改动才能用到现在完成时里.
答案
1、She joined the party last year.
She has been a party member for a year
2、My sister caught a cold last week.
My sister has got a cold since last week
3、The film have been shown for five minutes
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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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