所有语法错误都请帮我指出，谢谢！
My school
Hello, everybody! I’m Viya Michael. I ‘m a student. now I study in WuYi primary school, it is full of fun, and you can see smile faces everywhere.Our school is beautiful ,it’s a clean one, too. It’s covered with flowers and grass, so it’s full with fragrant. Our class room in a four-floor building. From this window always comes out our laughter. When we have the computer class, we will study in the computer classroom. If we have PE class, we will play and do exercise on our playground.
My school is not only beautiful, but also my friend and my dear teacher here. Teacher are teach me many useful knowele. I play, study with my friends, our day time are happy!
I love my school very much, we have a good time there.

My school
Hello, everybody! I’m Viya Michael. I ‘m a student. Now（改为Now，估计你是打错了） I study in WuYi primary school,(改为句号，it大写) it is full of fun, （将fun后面的逗号改为句号，去掉and，将you大写）and you can see smile faces everywhere. Our school is beautiful , it’s a clean one, too.（将这句话改为Our school is beautiful and clean.句子要简练，必要的地方要删繁就简） It’s covered with flowers and grass, so it’s full with fragrant. Our class room（加is，别忘了谓语动词） in a four-floor building. From this window always comes out our laughter. When we have the computer class, we will study in the computer classroom. If we have PE class, we will play and do exercise on our playground.
My school is not only beautiful, but also my friend and my dear teacher here. （我知道你这句话是要说“我的学校不仅漂亮，而且这儿有我的朋友和亲爱的老师”，但是在英语里不能这样表达，因为not only …but also…连接的是一个并列句，前后的成分要一致，你这里不仅意思不一致，而且语法也不一致。）Teacher are teach me many useful knowele. （改为：Teachers give me a lot of knowledge.这句话问题比较多，这里显然要用“教”这个实意动词，就不能再有助动词are。teach源于teacher，用teach的话会有重复之嫌，所以用give替换。Knowledge是不可属名词，所以不能用many，但如果用much，则感觉句子太单薄，语感上不舒服。） I play,（把逗号改为and,两个动词在一句话中并列用and连接） study with my friends, （将逗号改为句号，our大写）our day time are happy!
I love my school very much, （将逗号改为句号，we大写）we have a good time there.

从你写的这篇文章来看，你的文采不错，文章思维逻辑性强。但读过文章，给我的感觉Chinese—English的成分比较重，基础语法不扎实，语感不强，平时练习写作和口语比较少。（不过这不能怪你，是可恶的中国的教育制度造成的。:<( ）你的文章中一个明显的特点是：逗号断句比较多。这在中文作文中是很正常的，可是在英文中，表达完一个意思就是一句话，如果两句话之间有因果、转折等关系时，可以用逗号加连词连接两个句子。在并列句中使用and的时候，and前面不能有逗号。在文章中还要注意主谓单复数的搭配，以及动词、助动词的用法。这些是我给你提的小小的意见，希望你能够参考采纳，在英语学习的道路上继续加油，多到网上和大家探讨问题。