Yes but it would be a dependent clause.
It's not generally done, no.
Abcdefgh jklmnopqrstuvwxyz
Depending on the circumstances you could substitute a comma, a semicolon, or end the sentence with a period and start a new sentence.
a answer for the word commanded could be: The commander had commanded the worker to start doing his work
Some good words to start a sentence could be "Furthermore," "Additionally," "Moreover," or "Nevertheless." These words can help add coherence and flow to your writing.
And then, in the third week of band camp, we learned dance moves.
As can be used to start a sentence. As soon as I get the ticket, I will be very happy. As a result of the fall, he had injured his leg. As the night got darker, they could see more stars.
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.
Yes, I can start a sentence with "Is."
I creased the paper so I could start the origami.
Yes you can: Therefore, because you asked, I will give you an answer.
Yes, like for example. "The small bird flew across the ocean."