分析 本文是一篇提纲作文．根据所提供的材料信息，用英语给Tom写一封信．内容包括：1、描述该同学的行为；2、他的行为将造成什么后果；3、表示愿意帮助他．写作时人称以第一和第三人称为主，时态以一般现在时为主．重点词汇：skip classes （逃课）； absorb （吸收）；fulfill（实现）；let alone （更不必说）；care about （关心，在乎）；in the future（将来）高分句型：1．①Your mind often wanders in class，②so you can't absorb the important knowledge the teacher gives us． 你在课堂上经常开小差，因此你不能吸收老师教的一些重点知识． ①该句运用高级词汇Your mind often wanders 增强了文章的感染力；②so引导一个结果状语从句． 2．①There is no doubt that ②if you don't stop doing all these improper things，you can't fulfill your university dream，③let alone starting a promising future ①毫无疑问…；②if引导条件状语从句；③运用高级词汇let alone 提升了文章的档次．
解答 Dear Tom，We are good friends and I really care about you． Recently，I've noticed that you are not behaving yourself at school．Your mind often wanders in class，so you can't absorb the important knowledge the teacher gives us（高分句型一）．To make matters worse，you fail to finish your homework and sometimes even skip classes for no good reason．There is no doubt that if you don't stop doing all these improper things，you can't fulfill your university dream，let alone starting a promising future（高分句型二）．Besides，you will disappoint those who care about you，for which you will surely feel regretful in the future．I suggest you change your attitude towards study before it is too late．As a sincere friend，I am always ready to help．So just be open and talk about your problem with me．I am looking forward to your reply．
点评 提纲作文在写作时要注意要点的提炼要全，关键短语和句型要写对，准确运用时态，上下文意思连贯，符合逻辑关系，还要注意人称和时态使用要正确．尽量使用自己熟悉的单词句式，合理安排写作结构，平时注意积累词汇及语法知识．