How to put presence and circumstances in one sentence

When you use construct a sentence in german in past tense for example i drank milk on monday in the caravan the last tense version ich getrinken milsch am montag in mine whonwagen how would you put this is the write order if the sentence

Hey y'all! just a quick question! i am studying german, again. and i need some ideas to rememer the materials and be able to speak it.

One of the primary purposes of taxation is to guarantee that all citizens share in the expenses of government.