It’s simple, you use ‘der’ when using ‘the’ is appropriate. ‘Die’, on the other hand, is equivalent to ‘the’ and takes those places instead. Then comes ‘das’ which means ‘the’ and you can just map that to its English equivalent.

Hope it helps! :)

You can stick a lot of German words together, but it isn’t easy to give this mess a meaning. It isn’t normally used. More than 3 is blasphemy.