روش‌ هایی برای به خاطر سپردن سریع کلمات

In this video, Alisha answers 5 questions.
- What methods would you recommend to remember English words as fast as possible and for a long time?
- You say ""... and I answer them, maybe."" at the opening of video. This maybe means ""if I can"" or ""you ask plenty of questions and I pick randomly so maybe I can or I cannot pick yours?
- What is the difference between """"on-going"" and ""in-progress""?
- Here in Brazil, when the actors and actresses playe a role in soap operas, movies, and TV shows, they don't talk like ordinary people. They talk a little formal. I would like to know if the same thing happens in the USA.
- The verbs ""would"" and ""had"" both have the same form of contraction 'd. How to know what verb this form of contraction means?