No.
The new term commences on Monday.
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.
No, the sentence should be "he went into the sea alone" to be grammatically correct.
That sentence is grammatically sound. If you are writing formally, don't use conjunctions.
The ceremony will commence with a short prayer. The game will commence with the singing of The National Anthem.
Grammatically correct, maybe, but idiomatically wrong. We normally say "buy it for me."
yes
Yes, but it is still wrong. Grammatically correct is not the same as meaningful. Assuming you mean "yield for all time," use "give up for ever" instead of "...for never."
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
Personally, I don't think there is anything wrong with it. Personally, I believe I am correct.