在尊重原文的基础上修改如下：
In recent years, it is more and more popular to learn online. why do so many people like to learn online?
The main reason is convenience. You can learn online whenever it is and wherever you are. Moreover, time-saving is also an important reason for so many people to learn online. Especially many people are busy in working during the day, they have no time to have classes expect at night, and most of them are not willing to take part in normal classes.
In my opinion , every coin has two sides, so does E-learning. E-learning provides more chances for us to learn knowledge, widens our insight. but it is easy to make us lose ourselves in playing computer games. it not only wastes our time, but also makes us lose the interesting in studying. so we had better think it over before we choose E-learning.
请多注意主谓一致,如果能用一些非谓语形式及主从复合句形式,使句子更加紧凑简练,你的得分会更高.就这篇作文,我给你中档分10分,表达基本清楚,语句较通顺,有部分从句运用.