except和except for在用法上的区别是什么?

两词可以互换,但是except for可置于句首,因此该句选except forPS:否定句中用except,肯定句式可以用except for来替换This article has no blunders except a few mistakes。这篇文章除了一点小错外没有大错。此句可改为：This article is instructive except for a few blunders。这篇文章除了有些错误外,是有教育意义的。不过,在前后有相称的同类词语时,应用except,否则用except for。如：We come to school every day except Sunday。除星期天外,我们天天上学。（句中every day与Sunday同类） This dress is ready except for the buttons。衣服做好了,只是钮扣未缝上。（句中ready与buttons不同类）