The following sentences sound unnatural. Whenever you are trying to say in German that something changes (see the examplex below) the way the sentence sounds and feels in German is totally counter-intuitive and every time I try to say it in German I get stuck.
Examples:
Ist das korrekt oder klingen diese Sätze auf Deutsch ganz schief?
This is an example of a reflexive verb; the grammar of reflexive verbs sounds odd to English speakers because English does not really have them, though they are a feature of many other European languages. In my notes I've listed the following as reflexive abwenden, amüsieren, ändern, anfreunden, anhören, anmelden, anschleichen, anziehen, auflösen, ausruhen, ausziehen, ausziehen, bedanken, beeilen, befinden, befreien, beschweren, drücken, duschen, einnisten, entschuldigen, erholen, erinnern, erkälten, fragen, freuen, fühlen, gedulden, gewöhnen, gliedern, infizieren, kümmern, melden, richten, schämen, schleichen, sorgen, treffen, umbringen, umschauen, unterhalten, verirren, verkaufen, verlaufen, vermischen, versammeln, verspäten, verstecken, vorkommen, vorstellen, waschen, zurechtfinden, zusammentun. This is by no means a complete list, just the verbs I've come across that I've determined to have a reflexive meaning, possibly in addition to other meanings. (I'm not going to guarantee the list is 100% accurate either; I don't have anyone fact checking my notes.) For example, ändern has a transitive meaning as in
The typical case is that the verb has a transitive sense, but a corresponding intransitive sense as a reflexive verb. So sich ändern means "to change" as in
Translated word for word this sounds wrong in English, something like "The story changes itself." (To respond to infinitezero's comment, this is why the German sounds odd to an English speaker.) But this is just one of many differences between English and German. The upshot for learners is that when you see a reflexive pronoun in German what you often have to do is think an intransitive meaning for the transitive verb, or a similar intransitive verb in English. Some reflexive verbs in German don't have a corresponding transitive meaning for whatever reason; in those cases you just have to remember to use the reflexive pronoun in German, even though one is probably not required in English. There are also many verbs in German with both transitive and intransitive meanings where the intransitive meaning does not use a reflexive pronoun. For example:
You just have learn for each verb whether the intransitive meaning uses a reflexive pronoun. In the case of brechen, it's what is called an ergative verb, meaning that the mirror isn't breaking anything but is being broken. You can think of ergative verbs as forming a kind of passive voice when used with an intransitive meaning. On the other hand, with an agentive verb, the subject stays the same when you use it as an intransitive verb. For example "I'm stealing the money," vs. "I'm stealing." Agentive verbs rarely become reflexive verbs when translated to German, so it's usually only the ergative verbs you have to worry about. (There are, of course, exceptions; erinnern/"to remember" is one.)
German has more complex varieties of reflexive verbs as well. For example if a verb has both an accusative and dative object, then it may be possible to replace one of them with a reflexive pronoun to create a transitive verb:
In general there is more variety in the way that verbs are used in German compared to English. German grammar has a reputation for being difficult to master, and perhaps this is one of the reasons.
