It seems like English is this person's second language and writing a blog is a good way to practice. However, there are quite a few spelling and grammar errors.

It seems like English is this person's second language and writing a blog is a good way to practice. However, there are quite a few spelling and grammar errors. I can really recommend "English Grammar in Use" by Raymond Murphy on the subject. It is impeccable until the intermediate level and "Essential Grammar in Use" is great for advanced speakers.