Yes it is.
The grammatically correct response to "How are you?" is typically "I'm good, thank you," or "I'm doing well, thanks."
No, the correct form should be "Thanks to everyone who has already responded." since "everyone" is considered singular.
The phrase "c'est Grace" is grammatically correct if Grace is a person. If 'grace (Ã ) ' is used int the sense of thanks (to), then it lacks a complement.
The sentence above does not use correct grammar and should be rewritten as the following: Thanks to the rain, I am going to sleep very well this evening.
Only if punctuated: Thanks, God. If not directly addressing the Almighty, Thank God is the correct form.
Yes, 'for free', is grammatically correct.
"Not like that" can be grammatically correct, depending on the context.
Yes! That is grammatically correct!
This is not grammatically correct. The correct form is 'you do not know', or the abbreviated 'you don't know'.
'What a drunkard you are' is a grammatically correct English sentence.
"That was wrong" is a grammatically correct sentence.
Yes, it is grammatically correct.