Yes. There is no word that cannot begin an English sentence. But that does not mean that it is always a good way to begin one.
it IS physically possible, but not grammatically correct.
Yes, but it would not be grammatically correct.
yes
"That was wrong" is a grammatically correct sentence.
Yes, as in: "Will it snow in December?"
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."
The sentence is grammatically correct.
It certainly can be: Well phrased ideas are appealing.
Yes, it is grammatically correct.
The sentence "Rhoda's Crazy" is not grammatically correct. It is missing a verb to make a complete sentence.
'What a drunkard you are' is a grammatically correct English sentence.
That sentence is grammatically correct.