Languages › German When to Use Wann and Wenn in German With three words for 'when,' things can get a little confusing Share Flipboard Email Print ThomasVogel/Getty Images German Vocabulary History & Culture Pronunciation & Conversation Grammar By Hyde Flippo German Expert Hyde Flippo taught the German language for 28 years at high school and college levels and published several books on the German language and culture. our editorial process Hyde Flippo Updated February 25, 2020 English "when" can be expressed in German by three different words: als, wann, and wenn. In the past tense, "when" is usually als: "Als er gestern ankam," or "When he arrived yesterday." But here we will concentrate on the two German "w" words for "when." 'Wann' Is Related to Time In general, wann is a question word related to time, even when used in a statement. It usually asks or relates to the question "when?" In a statement such as "I don't know when the train is arriving," the word wann would be used. (See examples above.) It can sometimes mean "whenever," as in "Sie können kommen, wann (immer) sie wollen." Wann kommt dein Bruder? | When is your brother coming?Ich weiß nicht, wann der Zug ankommt. | I don't know when the train is arriving.Sie können kommen, wann (immer) sie wollen. | They can come whenever they want.Seit wann wohnst du in Berlin? | How long (since when) have you been living in Berlin? Four Situations That Call for 'Wenn' The word wenn (if, when) is used more often than wann in German. It has four main uses: It can be subordinating conjunction used in conditionals ("Wenn es regnet," or "If it rains").It can be temporal ("jedes Mal, wenn ich," or "whenever I"), usually translating as "whenever" in English.It can indicate concession/conceding ("wenn auch," "even though").It is used in wish-phrases with the subjunctive ("wenn ich nur wüsste," "if I had only known"). Wenn er nervös ist, macht er Fehler. | When he's nervous, he makes mistakes.Immer, wenn er nach Hause kommt, ist es sehr spät. |Whenever he comes home, it's very late.Wenn ich nur gewusst hätte! | If I had only known!Wenn man da oben steht, kann man sehr weit sehen. | When you stand up there, you can see very far.