is grammatically correct
Esta frase suena bien, pero no es gramaticalmente correcta.
This sentence sounds good, but it isn’t grammatically correct.
La oración que escribiste es gramaticalmente correcta.
The sentence you wrote is grammatically correct.
Esta frase suena bien y es gramaticalmente correcta.
This sentence sounds good and is grammatically correct.
Esta frase es gramaticalmente correcta.
This sentence is grammatically correct.
Dudo sobre qué oración es gramaticalmente correcta.
I'm unsure which sentence is grammatically correct.