Grammar: how can I improve it.

Not all words are written as they sound. Reading improves vocabulary and grammar.

She's probably right. Learning grammar is easy when you constantly get correct input. While comsciously STUDY grammar won't help.

as for books it depends on your age.
visit goodreads.com to find books to improve your grammar

I wouldn't suggest spoken English as an ideal way to improve grammar. For example, many speakers, even native speakers, make some common mistakes when it comes to speaking.

The best advice I can give you is to read. Read as much as you can. Books, Newspapers, online articles, etc. Make sure what you are reading is the written by someone who is proficient in English. While learning through

I think the mistakes that natives made might not be considered mistakes. Since natives speak it that way, how could it still be a mistake?

An example would be:
The reason you asked this question is because you want to improve your grammar.

This is grammatically wrong if you analyze it, the correct version would be
The reason you asked this question is

ABF is Are there any books you would recommend for me?

Practical English Usage by Michael Swan, published by Oxford University Press.

This is an easy-to-use, comprehensive and reliable guide that ise useful for both learners and teachers.

It may be acceptable in spoken English, but not in written English. Since this forum mainly deals with written English, it is the aspect we have to worry about.

Such mistakes you mention are more tolerable in spoken English, because you will more or less grasp what the other guy is speaking about under the circumstance. In written form however, you need to abide by the rules to express yo

I agree...so you think it’s okay if I have grammar mistakes because it’s not my first language?

You're right. I do write a lot of reports in english ,well I'm a student so this is probably what I need. I need people to understand what I write.