Breakdown of Mein Rücken knackt manchmal nach dem Sport, deshalb dehne ich mich langsam.
Questions & Answers about Mein Rücken knackt manchmal nach dem Sport, deshalb dehne ich mich langsam.
Because Rücken is the subject of the first clause, so it is in the nominative case.
- Rücken is a masculine noun
- the masculine nominative form of mein is mein
So:
- mein Rücken = correct for the subject
- meinen Rücken would be accusative, used for a direct object
- meine Rücken would be plural
Example:
- Mein Rücken knackt.
- Ich dehne meinen Rücken.
Knackt is the 3rd person singular present tense form of knacken.
It matches mein Rücken, which is grammatically he/it in German:
- ich knacke
- du knackst
- er/sie/es knackt
German often uses the present tense for things that happen regularly or sometimes, so knackt manchmal is a natural way to say that this happens from time to time.