My Errors

I often make this kinds of errors.

・naked singulars
・3rd person singular verbs

For example,
 ・ I couldn't help laughing when I reached ending!
→ I couldn't help laughing when I reached the ending!

・A god try to make people immortal.
→ A god tries to make people immortal.


Why do I often make this kinds of errors?
The answer is I'm not used to writing and my attention to sentences is not enough. 
I couldn't realize what errors I made before the teacher commented on me.
When I was a high school student, I rarely have a opportunity to write sentences in English.
But through this class, I learned my error's feature so I think I grew up a little.
I want to continue to write a blog.
Thank you.