Breakdown of Wenn du erfolgreich sein willst, musst du viel lernen.
sein
to be
du
you (informal singular)
lernen
to learn
viel
much / a lot
Questions & Answers about Wenn du erfolgreich sein willst, musst du viel lernen.
Can I rewrite this sentence using um ... zu?
Yes! You can say Um erfolgreich zu sein, musst du viel lernen (In order to be successful, you must study a lot). The wenn (if) sentence expresses a condition, while um ... zu expresses a purpose, but here they achieve a very similar goal and are highly related.
Why does the second part start with the verb musst instead of du?
In German, the main verb must be in the second position of the sentence. The entire wenn clause (Wenn du erfolgreich sein willst) counts as the first block of information. To keep the verb in position two, musst comes immediately after the comma, followed by the subject du.
Why is willst at the very end of the first part?
The word wenn (if) is a subordinating conjunction. This is a grammar term for a word that kicks the conjugated verb—in this case, the modal verb willst—to the very end of its clause, right before the comma.
Why use lernen instead of studieren for "to study"?
In German, studieren is only used for being enrolled at a university or studying a specific major (like law or biology). For the everyday act of studying for a test, reviewing materials, or practicing a skill, you always use lernen (which means both "to learn" and "to study").