You're all native speakers aren't you?
I always find it curious how many English native speakers brag and compete over knowing the grammar of their own mother language.
If you don't know the grammar of your own native language you're illiterate and should go back to school. I never make grammatical mistakes in Finnish, and that's the norm in Finland. It's so weird to think there are so many Americans who don't understand their own grammar. It's even more bizarre to see people take pride in being able to write in their own native language. It's like taking pride in being able to not be retarded.
It's not an accomplishment people, you're literally barely passing the lowest bar in school.