Ich habe gestern einen Film gesehen.
English: I watched a movie yesterday.
The 'Satzklammer' is a special sentence structure in German. It means 'sentence bracket'. In German, verbs are often split, with one part at the beginning and another part at the end of the sentence.
You use the Satzklammer in German when there are two parts of the verb, like with modal verbs, the perfect tense, or separable verbs. The first part comes early (usually the second position), and the second part goes at the end of the sentence.
Ich habe gestern einen Film gesehen.
English: I watched a movie yesterday.
Er wird nächste Woche nach Berlin fahren.
English: He will go to Berlin next week.
Wir können heute nicht kommen.
English: We cannot come today.
Sie steht jeden Morgen früh auf.
English: She gets up early every morning.
Du hast das richtig gemacht.
English: You did that correctly.