The word “but” can help you make long sentences.
You can say:
I ate dinner. 😋
I am still hungry. 😞
But it is better to make one long sentence.
>>> I ate dinner, but I am still hungry.
It is sunny. ☀️
It is is cold. ❄️
>>> It is sunny, but it is cold.
BUT means the second part is different.
I would write more, but I have to go to sleep now.