Answer:
I know a doctor whose last name is Doctodoctor.
If it's "The last names Doctodoctor" then it sounds like you're talking about your last name.
Answer: the same letter or sound at the beginning of adjacent or closely connected words (i.e. <u>s</u>wift <u>s</u>eagulls <u>s</u>leep <u>s</u>oundly)
Examples, one with a comma and one without:
Shakespeare was born in Stratford and went on to write Hamlet.
Shakespeare was born in Stratford, later writing Hamlet
You could calculate them because it would help you a lot faster
