German has a feature that surprises most new learners: a single verb can split into two pieces within a sentence. These are called trennbare Verben (separable verbs) — verbs built from a short prefix like auf-, an-, or ein- glued onto a base verb, such as aufstehen (auf + stehen, "to get up") or anrufen (an + rufen, "to call on the phone").
In the dictionary or in the infinitive form, you see the verb whole: aufstehen. But the moment you use it in an ordinary main clause, the prefix breaks away and travels to the very end of the sentence, while the core part of the verb stays in its normal place — second position — conjugated for the subject. So in Ich stehe um 7 Uhr auf, steh(e) sits in second position, and auf has moved alone to the end. Read start to finish, the verb and its prefix reassemble the original meaning, aufstehen.
Why does German do this? Because the rule that the conjugated verb occupies second position is extremely strict. When a verb is built from two parts, only the conjugated piece keeps that privileged spot; the fixed piece — the prefix — gets pushed to the far end of the sentence, like a signal telling you extra meaning is still coming.
Learners whose native language treats the verb as one indivisible block often simply forget to write the prefix at the end, saying Ich stehe auf um 7 Uhr instead of Ich stehe um 7 Uhr auf, or leave the verb glued together as if the infinitive form were always correct.
One detail that saves confusion: with a modal verb, the separable verb stays fully joined at the end (aufräumen); in commands, only the prefix moves to the end (Räum dein Zimmer auf!). Either way, the prefix or the whole verb always drifts toward the end — never staying stuck right next to the subject.