no it is not grammatically wrong but it is better to ask where are you if you want to use it in question...
"That was wrong" is a grammatically correct sentence.
Grammatically correct, maybe, but idiomatically wrong. We normally say "buy it for me."
the n needs to be "and"
Yes. There's nothing wrong with it grammatically.
Only #1 is grammatically incorrect, although the question itself is grammatically wrong. It should read "Which of the following sentences is grammatically right." There is more than one sentence so it needs to be "sentences", not "sentence". Number 1 is wrong: it should be "This will remain between you and me" The object of the preposition "between" needs an accusitive form. Number 3 is also wrong, but it is not grammatically wrong. "Lays" is a transitive verb; you need the intransitive "lies" so the sentence should say "He lies on the couch" That is an error in vocabulary, not grammar. As well, the "i" in number 2 and the "he" in number 3 should be capitalized. Capitalization is not grammar.
"That was wrong" is a grammatically correct sentence.
Grammatically correct, maybe, but idiomatically wrong. We normally say "buy it for me."
yes
It is grammatically correct to say: There is nothing wrong with this machine.It is not grammatically correct to say: Will it is be grammatically correct to say ....The correct way to write that or say that would be: Would it be grammatically correct to say....
Could you please provide more context or details about what "they" are doing in order for me to determine if it is grammatically correct?
no, it's grammatically wrong
No. The new term commences on Monday.
Personally, I don't think there is anything wrong with it. Personally, I believe I am correct.
the n needs to be "and"
The grammatically correct version in American English is "Even when you're right, you're wrong."
Using "back" and "again" together in the same sentence is redundant because both words convey the idea of repetition or return. It is unnecessary to use both in the same sentence because they essentially mean the same thing. Instead, you can choose one word to convey your meaning more clearly and concisely.
Could you please provide the sentence in question so that I can help you determine if it is correct?