my mother was ill,i have to stay at home中的have to
题目
my mother was ill,i have to stay at home中的have to
my mother was ill,i had to stay at home中的had to 改成must行不行,强调妈妈生病了,我必须在家
答案
可以改.但是语感变了.must用于积极的情况多些.碰到消极情况你不得不被耽误的情况要用have to,表示有义务去做同时表示客观上不得不去做.
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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