Yes.
"That was wrong" is a grammatically correct sentence.
This sentence is not grammatically correct. For the sentence to be grammatically correct, the space between "in" and "to" would have to be removed. Therefore the sentence should read "They are into skating."
The correct formation of this sentence will be: "This meeting is of utmost importance."
The sentence is grammatically correct.
The sentence "Rhoda's Crazy" is not grammatically correct. It is missing a verb to make a complete sentence.
Yes, it is grammatically correct.
'What a drunkard you are' is a grammatically correct English sentence.
That sentence is grammatically correct.
Yes, the sentence is grammatically correct.
This sentence is grammatically correct.
This sentence is grammatically correct.
Yes, the sentence "his hand is filthy" is grammatically correct.