[解析]
Dear Dad and Mom,
I really didn't think it's a good idea to attend extra classes during the weekends. You believe only high marks in the national exam can ensure the good college and that if I were in such classes I would cause much fewer trouble.
But I really doubt whether such classes will ∧ helpful. I think attend extra classes during the weekends will make meto rely on them. After being busy formy studies in the school for a whole week,I really need some times to do something I like. After which I will feel good enough for the next week. Besides we don't have money to burn,so don't waste them .
How I wish you could agree with me.
Yours,
Dave
1.didn't改为don't.考查动词时态。句意:我不认为周末上课外班是个好主意。通篇是一般现在时,因此此处也用一般现在时,故didn't改为don't.
2.the改为a.考查冠词。句意:你认为只有高考高分才能确保上一所好大学,并且如果在这样的课外班,我会少惹很多麻烦。这里泛指一所好大学,用不定冠词,good 的发音以元音音素开头,故the改为a.
3.fewer改为less.考查形容词比较级。句意同上。trouble是不可数名词,few修饰可数名词复数,little修饰不可数名词,用比较级表示更少,故 fewer改为less.
4.will 后加be.考查系动词。句意:但我真的怀疑这样的班是否会有帮助。will后面用动词原形,但helpful是形容词,所以加系动词be构成主系表结构。故will 后加be.
5.attend改为attending.考查动名词。句意:我认为周末上这样的课外班让我依赖它们。动词作主语时要将其名词化,所以要用动名词做主语。故attend改为attending.
6.去掉to.考查动词不定式。句意:我认为周末上这样的课外班让我依赖它们。让某人做某事用"make sb. do sth."后面是省略to的动词不定式作宾语补足语。故去掉to.
7.for改为with.考查介词。句意:在学校忙了整整一个星期的学习后,我真的需要一些时间去做我喜欢的事情。忙于做某事"be busy with sth.",是固定短语。故for改为with.
8.times改为time.考查短语。句意:在学校忙了整整一个星期的学习后,我真的需要一些时间去做我喜欢的事情。time表示"时间"时是不可数名词,没有复数形式。故times改为time.
9.which改为that/it.考查代词。句意:在那之后,我就会对下周感到足够好了。"在那之后"用"after that"或"after it"来表达,after是介词,该句中没有先行词,所以不是定语从句,不要引导词。故 which改为that/it.
10.them改为it.考查代词。句意:此外,我们没有钱烧,所以不会去浪费钱。money 是不可数名词,用it指代。故them改为it.