This is a grammatically correct sentence. - This sentence is grammatically correct.
This is a grammatically correct sentence.
This sentence is grammatically correct.
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.