Respuesta :
Yes, it seems like your sentence's grammar is perfect. The only problem is after your two sentences. You wrote "It is correct grammar?". This is a statement with a question mark at the end. To fix it, switch "It" and "Is". You'll get "Is it correct grammar?" Hope this helps!
Another way you could improve your sentence structure is, removing 'It' and placing 'this' after the 'is' - it would then read - 'Is this correct grammar?' another way you could write it would be 'Is this grammatically correct?'