Excellent question. As I told you in my first lesson that I love watching so many different English movies, and each of them were watched up to 10 times or more. The good thing that you will get from this strange and time-consuming exercise is that many useful English expressions will automatically get into your head including all the tenses. I used to hate learning tenses directly from textbooks because no matter how good your memory is, in the end you would hesitate to use it. I can assure you that even native speakers also face this kind of difficulty/challenge.