Question

英语句子改错，大神求教！！！！！！！！！

第二段倒数第二行，第一，serious 为什么变成 副词形式
第二， take 为什么不用改成 过去式，

Answer 1

因为副词修饰动词，意思是对你的成绩要认真负责点
you d better /you d better not后面是跟动词原型，这是语法规定，意思是你最好。。。你最好不要。。。

Answer 2

不要问为什么，照办就行了。
Dear Tom,
I am sorry to hear that you are having problems with your exams. You are not the only one because many other students have the same problems.
You tell me that you are too worried to sleep well the night before the exam. Actually it is very natural. To avoid being too worried or nervous, you'd better not take your grades seriously. Once / if you have a proper attitude towards your exam scores / grades, you will sleep well and feel energetic.

Answer 3

you'd better 或you'd better not 后面要接动词原形

take something adj，是一种固定用法，后面要用形容词。

Answer 4

would better to do sth 或是would better not to do sth