Yes, I can!
Yes, your Honor.
Yes, your Grace.
yes you can
Yes, certainly you can. Then you can start writing.
yes.
Yes
Yes. 'Thus' is another word for 'therefore'. Thus the sentence you start of with 'thus' should be an explanatory sentence.
Yes, I can start a sentence with "Is."
Yes, you can start a sentence with a verb.
Yes, you can start a sentence with an acronym.
Yes, you can start a sentence with "where," such as "Where did you go yesterday?" or "Where is the nearest grocery store?"
Yes you can! "For ten long years, I pondered how to start a sentence with 'for'."
Yes, a quote form Shakespeare will tell you that you can start a sentence with to. :To be, or not to be?
Yes, you can start a sentence with the keyword "apple."
Yes, you can start a sentence with the abbreviation "FYI."
Yes, you can start a sentence with the acronym "NASA."
yes you can
Yes, a sentence can start with a pronoun. For example, "She went to the store."
Yes, certainly you can. Then you can start writing.