1.用词不当
学生们写的托福作文里或多或少都会有一些用词不当的问题，但是要注意的是一些最最基本的错误是不能犯的。
? In the show, if participators answer twenty problems that the host mentioned correctly, they will get five hundreds thousand U.S. dollars as a prize.
problems应改为questions
2.拼写错误
这里的拼写错误不是指在考试时候的误打，而是本身对词汇拼写记忆的错误。
? In conclusion, issue of whether parents are the best teachers is a complex one, requiring subjective judgement, consequently, there are no easy or certain answers.
judgement应改为judgment
3.乱用大词
First of all, children can earn money from their jobs, although there isnt too much, but they will keep their salary gingerliness.
这里的gingerliness根本是不知所云。该句子还有以下问题：
1）该作文题目是讲学生是否应该做兼职，因此children的出现就显得很莫名其妙；
2）although和but是不能连用的；
3）指代不明，they不知道是指代前面的什么；
4.表达中式
The second argument-it might have been noticed by others-is that in some occasion, it is quite difficult to compare parents to teachers because parents are a kind of people, teachers are a kind of vocation.
句子中划线部分的表达过于中式化。
5.表意重复
?They shocked their friends, devastated their families, crushed their best friends.
前面已经提到了朋友，后面又提到朋友。
? The show is so compelling but attractive.
?compelling和attractive是同义词，所以这里这么写就让人不明白。
6.固定用法错误
? To some extends, I agree with the authors general assertion that if parents also have a comprehensive sense of professional knowledge.
To some extends应改为To some extent