The word 'is' can begin a sentence but not be a question when it is the subject of the question. Example sentence - Is can be the subject in a sentence.
But only in sentences of that type (above) or, 'Is' is a two letter word. Otherwise is cannot begin a sentence.
Yes. There is no word that cannot begin an English sentence.
It is possible to have a sentence with the word it at the beginning, as this sentence proves.
Never
yes you can
As a question, it can be a sentence, like: A sentence can have one word, and as a question then it can be a sentence: Who?
Of course you can. There is no word in English that cannot begin a sentence.
The sentence with the word 'why': Why do you ask this question?
Yes, you can begin a sentence with the word "or" when presenting options or alternatives. For example, "Or you can choose to study abroad for a semester."
Yes, a sentence is allowed to begin with the word "with". For example: With all the pressure of high school people were becoming stressed.
"Is" is the second word of the question, "What is the second word of this sentence?"
lettuce begin (let us begin)
the student answered the teacher's question nervously.