You use the word "always" correctly in each of the examples. Just make sure to spell it "always" instead of "alwais." In the third example, it looks like you forgot to include the word, "mistake." It should look like this: A: Look! You've made the same mistake again. B: Oh no, not again. I am always making the same mistake.

oh thank you very much for this answer! very helpful! I hope not to forget anymore how to use 'breaking down' and in the meantime I learned the meanin of 'to brake' :D

In your second set, in reference to the car, you wrote "It is always breaking." It would be better to say "It is always breaking down." Note that "breaking" and "braking" are pronounced the same way, so maybe we English speakers prefer "breaking down" so as to avoid confusion with "braking." But we also use "breaking down" in reference to any machinery or appliances. Your blender may "break down" but your dishes just "break." Of course, it you drop the blender, it may "break." If the blender "breaks down," that means that something has gone wrong in the mechanism making it run.