Feeling good
The phrase 'Sich gut fühlen' is the German equivalent of 'Feeling good'. It is used to express a sense of well-being or contentment. The phrase is made up of the reflexive pronoun 'sich', the adjective 'gut' (meaning 'good'), and the verb 'fühlen' (meaning 'to feel'). It is important to note that in German, the verb often comes at the end of the sentence in the main clause, but in this case, it is used in the infinitive form because it is part of a reflexive verb construction.
I feel good after I have slept
In this sentence, 'sich gut fühlen' is used to express well-being after a certain event, in this case, sleeping.
When I feel good, I go for a walk
This is an example where 'sich gut fühlen' is connected to a condition or a cause for an action. This action is going for a walk when the speaker is feeling good.
He feels good, so he will play
In this sentence, 'sich gut fühlen' is used to explain the reason behind someone's intention to take an action, in this case, to play because he feels good.