Auxiliary Verbs: DID YOU or DO YOU - Basic English Grammar

In this video, Alisha answers 5 questions. - What is the meaning of the phrase "to get used to doing smth"? Does it refer to a completed action or not? And can we use it in Present Simple, like "I get used to getting up early"? - What's difference of "Did you/Do you...Are you...when I ask? - I am a bit confused with the difference between the present perfect and the present perfect continuous. If I want to say that I live in some place since some time, which one should I use? - What does "Can't help + (progressive form)" mean? - What is the difference between have to and must?