这个句子有什么语法错误吗?I only knew a small truth when I was a 10-year old child that it is of

这个句子有什么语法错误吗?I only knew a small truth when I was a 10-year old child that it is of
I is,really,the values of responsibility.I only knew a small truth when I was a 10-year old child that itis of great importance to study hard sothat I can have a good future.But now,I know it’s vital to keep healthy ,so I need to pay more attention to it.
Thus,I suppose everythingwill become successful and effective,which is helpful for increasing peace and goodness in society,suchas to cultivate the sound personality,to ascend ability/to promote strong ability,to enhance the sense of responsibility and so on .
当我还是10岁的小孩子时,我只知道一个小道理,就是为了未来去学习是重要的.但现在我知道保护健康才是最重要,并且我会放更多的关注这块问题.这样一来,我想一切都会变得成功和有效,比如培养健全的人格、提升更强的能力、增强责任感t等等
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