e.g. when we use wenn the verb goes to end. If the sentence starts with wenn, the second clause starts with verb as follows:
Wenn es morgen regnet, gehe ich ins Kino.
I think it is similar for weil and als too. But for denn, the verb doesn't go to the end, stays in second position. How can one know where to put verb for which conjunctions? What are the other conjunctions that follow this rule? Does second clause always start with verb?