一篇简单的英语作文，看看有没有什么语法错误？

My family
I have a family.There are five people in my family.There are my mother,my father,my sister,my brother and I.My father is 39 years old.He is of medium build (build -->size)
and medium height.He is a little strict (你想表达严肃呢,就strict -->serious; 你想表达对我们要求严格呢，就strict -->strict with us)
.My mother is 35 years old.She has long hair and is of medium height.My sister is little.She is (加个only在这里较好,前后更呼应) 2 years old.She is very cute.My brother is small (small -->young)
.He is 10 years old.He has short black hair and is of medium build (build -->size).
I have a happy family! (个人觉得最后一句改为What a happy family I have!更好结尾．你写的好像才刚开始，还没讲完一样．）
写得不错，修改只是个人意见，随你而改！

There are my mother,my father,my sister,my brother and I.

改为：

They are my mother,my father,my sister,my brother and I.

My brother is small.

改为：

My brother is young.

应该是这些了。

I have a family.There are five people