Questions & Answers about O céu hoje está azul.
Why do we use está instead of é? Isn't the sky permanently blue?
Why is hoje in the middle of the sentence? Can I put it at the end?
Yes, you can absolutely put it at the end (O céu está azul hoje) or at the beginning (Hoje, o céu está azul). Portuguese word order is very flexible with time words. Placing hoje right after the subject (O céu) is just a natural way to slightly emphasize the time without making it the absolute main focus of the sentence.
Would the word azul change if it described a feminine noun instead of the masculine céu?
What does the accent mark on céu tell us?
The acute accent tells you to pronounce the e with an open sound, similar to the vowel in the English word "pet." It also guarantees that this part of the word gets the spoken stress.