Here is an example of present perfect: "My brother has just left for school."
Here is an example of past perfect: "I'd been to Disney Land when I was little."
Answer:It can be an informative speech if you look equally at both sides, pro and con, of whether aliens were there.
Explanation: Hope this helps
Answer:
A.The Revolutionary War occurred during the 19th century.
Explanation:
Claim, evidence, commentary, repeat?
Make sure you have a concession and refutation somewhere and a strong thesis at the beginning.