,麻烦老师有空帮我改改 Since January 1st 2007, Guangzhou government has began to take total measures of the ban on motorcycles. Before the ban on motorcycles,my father ofen sent me to school by motorcycles, which is convenient. Just due to its advantages with quickness ,convenience and saving money, the laid-off workers can go on their careers throught it.However, to ban the motorcycles can reduce the pollution and decrease the happening of hijacking and the traffict accidents.In general, the advantages of ban on motorcycles overweight the disadvantages.还有~~~~我不懂用介词啊~~~如何可以用好介词??有方法的吗?

, Since January 1st 2007, Guangzhou government has began(began 有明确的过去时间，不能用完成，好好听时态课！！) to take the measures of the ban on motorcycles. Before the ban on motorcycles,my father often sent me to school by motorcycle(s), which is(was) convenient. Just due to its advantages with (of) quickness ,convenience and saving money, (the laid-off workers can go on their careers throught it.此句有点不明白)However(But), to ban the motorcycles can reduce the pollution and decrease the happening of hijacking and the traffict accidents.In general, the advantages of ban on motorcycles overweight(s)the disadvantages.改上述几处，文章写的不错，句子整齐正确，中心---说理----结论.都比较清爽明确，总的来说--- 不错！

很谢谢老师啊其实都没想到老师会有空帮我改的~~高考将近~~我一定要加紧练好作文速度和质量～～因为我现在在家学习．没上课～所以我每天写的作文都会发上来～～但老师可不必改～我只是等老师有空才来看看有什么错处必竟要麻烦老师天天麻烦老师也过意不去～^_^

我尽量，不敢保证每篇都能改。好好学习。