Answer:
Yes.
Explanation:
A comma is needed in this sentence. The comma will be located after the word <em>late</em><em> </em><em>:</em>
Because I turned in my essay a day too late, my English Professor deducted ten points off my grade.
Answer:
I don't see any examples, am I missing something?
Le escribe Rolando un mensaje electronico a miguel?
answer: No, Rolando no le escribe un mensaje electronico a miguel.
I don't know if you need to write the answers on a negative way(words like no, never, etc) but on the first question give you details to how answer a questions in a correct way.
Ex. le compras una camisa a tu novio? No, no le compro una camisa. (negative way) you need to read carefully all the sentences to see the correct way to answer.
Hope this helps, good luck.