"Which kind of books is..." The verb has to agree with kind in number.
It is a bit odd sounding to say "kind of books"...not wrong just odd. It seems to emphasize that you expect more than one type in the kind. You more often hear "Which kind of book is..."
What kind of person is correct.
Both are grammatically correct, but the normal word-order is "you are correct." The inverted word-order of "correct you are" is used for an emphatic, ironic or humorous effect.
The sentence "when you r coming" is not correct grammatically. It should be "When you are coming."
Could you please provide more context or details about what "they" are doing in order for me to determine if it is grammatically correct?
Yes, "is much more easily" is grammatically correct because it follows the correct order of adverbs (much, more, easily) when comparing multiple items or degrees in a sentence.
Yes, but "joined" should be "join" in order for the question to be grammatically correct.
A grammatically correct sentence follows the rules of syntax and grammar in a specific language. This includes using proper word order, punctuation, verb tense, subject-verb agreement, and sentence structure. Grammatically correct sentences are clear, coherent, and convey the intended meaning effectively.
It is grammatically correct, but the word order is unusual, suggesting a Yiddish influence.
No, it is not. There is not such thing as "use to". It is always "used to". (with a D). However, with that minor detail it would be. If you were to structure the sentence with the inverted order, it woul read: "That didn't used to be a school." That is a grammatically correct sentence/question.
Yes. Although the word order is unusual, and not suited for normal speech, it is not grammatically incorrect.
It's not grammatically correct since frío should be fría in order to agree in gender with the noun bolsa, but it means "My bag is very cold".
I would need the statement you are referring to in order to assess its grammatical correctness.