Personally, I don't think there is anything wrong with it. Personally, I believe I am correct.
"That was wrong" is a grammatically correct sentence.
yes
No its wrong. Use "he went to sea alone"..
the n needs to be "and"
That sentence is grammatically sound. If you are writing formally, don't use conjunctions.
Yes. There's nothing wrong with it grammatically.
No.
no it is not grammatically wrong but it is better to ask where are you if you want to use it in question...
There is nothing grammatically wrong with the sentence "We were wondering."
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.
No, it is grammatically wrong and contains a spelling error.
The sentence is grammatically incorrect. It should be structured as "Taking a psychology test," with the subject preceding the action.