I think the best way to help students understand when to use certain tenses and what they mean and the difference in meaning of similar forms (must have done sth must have sth done) is just purely and simply by contrast, translation and contrasting them with their own L1 as well as to provide to the tools to focus on the "general or specific" and the time references they are using. The time reference (for ... since... nowadays,.. every ...)helps us know what tense to use.
Where do you go on holidays? USUALLY (GENERAL)
Where are you going on holidays THIS YEAR? (SPECIFIC)
Where have you been?
where did you go?
..unfinished...