同学你好，该知识点来自沪江网校《西班牙语零起点0-B1中高级直达【学霸现金奖励班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
Are you sure that the small pig has turned into a stone? she asked.
这里用are you sure比较自然，你确定……你肯定……吗

That's impossible! he laughed. You'd better not say such foolish things.
impossible不可能，前面不需要加not了
不说said to laugh，没有这种表达
had better not do 最好别做……
remarks评论，在这里不是很适合。

Then he added, Pigs can't be turned into stone, whether they are big or small.
add补充说道，接着说道

祝同学学习进步~