The question appears to be incorrect...
Would: "That is her boyfriend." be grammatically correct? Is a correct question that can be answered in the affermative: Yes.
Saying, "I am annoyed of the way you behave.", is grammatically correct.
Sure. It would also be grammatically correct to write He spoggled his nubbix on the goober. Grammatically correct and meaningful are not the same.
Not. "Are you angry to me?" would be correct.
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....
The phrase "how don't I" is not grammatically correct. A more correct way to phrase it would be "why don't I."
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."
Yes, I would say that sentence would be grammatically correct.
As in someone trying to remember where they left off, "Where was I?" is correct, yes.
Yes, that sentence would be grammatically correct.
The correct phrasing is "my partner and I." Using "my partner and me" in a sentence as the subject would be grammatically incorrect.
Set would be grammatically correct.
It is not, but it is widely used because it conveys the general idea of the question as well as its grammatically correct version.No you should say "Where are you" the at at the end is not needed.