Yes you can star a sentence with and, only sometimes you cant do it for every sentence but one or twice in one page but in a paragraph it is one.This is your answer. You're welcome!
Yes you can. Example: Okay, I will go with you.
Yes.
It's okay for you to stay.Yes as in For example, .... and For once in your life, do the right thing.
Yes, if the sentence is otherwise well written and it fits within the context of the paragraph.
Yes, it is OK. Example sentence: On the day of the race, I woke with a bad headache.
Yes, it is generally acceptable to start a sentence with "but," particularly in informal writing. However, it is best to use this approach sparingly and ensure that the sentence structure is clear and the use of "but" is appropriate for the context.
The/This data is okay.
Sure. Am I wrong? That is an example. Am I interrupting something? That is another. Well, that is not strictly true, that is starting a question with 'Am', okay a question is a type of sentence. But you cannot start a statement with 'Am', the word should be spelt I'm.
okay
It would be awkward unless you are using it to draw attention to your opening clause, i.e.: "Of this one thing I am certain: etc... etc..."
Yes.
No, you cannot start a sentence with "no" unless you need to do so. No reason exists not to start a sentence with that word, as you can see. No one will care if you do start a sentence with it.