英语改错题,请告诉我错误的地方.在问题补充里,请往下看.请按顺序给我答案,谢谢!
题目
英语改错题,请告诉我错误的地方.在问题补充里,请往下看.请按顺序给我答案,谢谢!
1．My friend has spent four years to study mathematics at that college, and he seems to have learned a lot during those years.
2.If anyone happens to come to see me while I am out this evening, please have him to leave a message for me.
3. The Greens were used to have Chinese food during their three months' stay in Shanghai.
答案
前半句的 to study 改为 studying
因为：spend time doing sth 花费时间做某事.
后半句have him to leave 中的 to 去掉
因为：have sb do sth 使某人做某事
have改为having
因为：be used to doing 习惯做某事
保证准确率~
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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