In German, separable verbs are verbs that consist of a prefix and a root, and the prefix can be separated from the root in certain tenses or sentence structures. Here are some guidelines for using separable verbs in German:
In the present tense, separable verbs are usually written as
one word. For example, "anrufen" (to call) is written as one word:
"Ich rufe dich an." (I am calling you.)
In the past tense (Perfekt), the prefix of the separable
verb is separated from the root and moved to the end of the sentence. For
example, "anrufen" becomes "Ich habe dich angerufen." (I
called you.)
In the simple past tense (Präteritum), the prefix of the
separable verb is separated from the root and placed at the end of the verb
stem. For example, "anrufen" becomes "Ich rief dich an." (I
called you.)
When a separable verb is used in an infinitive construction,
the prefix is separated from the root and placed at the end of the sentence.
For example, "Ich versuche, anzurufen." (I am trying to call.)
In commands (Imperative), the prefix is separated from the
root and placed at the end of the sentence. For example, "Ruf mich
an!" (Call me!)
It's important to note that not all verbs in German are
separable. Some verbs, like "haben" (to have) and "sein"
(to be), are inseparable and cannot be separated from their prefixes. Separable
verbs can take some practice to get used to, but with time and practice, you
will become more comfortable using them.