This sentence is grammatically incorrect. - This is a grammatically incorrect sentence.
This sentence is grammatically incorrect.
This is a grammatically incorrect sentence.
It's grammatically correct, but native speakers wouldn't say that. - Grammatically, it's correct, but native speakers wouldn't say something like that.
It's grammatically correct, but native speakers wouldn't say that.
Grammatically, it's correct, but native speakers wouldn't say something like that.