Questions & Answers about O chefe está de mau humor hoje.
Why do we use the preposition de instead of em for 'in a bad mood'?
In Portuguese, temporary states of mind or condition often use the preposition de rather than em. The structure estar de is used for many temporary situations, such as being on vacation (estar de férias), on duty (estar de serviço), or in a certain mood (estar de mau humor). Could I use mal instead of mau in this sentence?
No, because mau is an adjective meaning 'bad', and it describes the noun humor. mal is an adverb meaning 'badly'. A helpful rule is to look at their opposites: the opposite of mau is bom, and the opposite of mal is bem. Since you would say de bom humor (in a good mood), you must use mau here. Why is the verb está used here instead of é?
We use está from the verb estar because being in a bad mood is a temporary state, emphasized by the word hoje (today). If you used é from the verb ser, it would mean the boss has a permanently bad personality. How would this sentence change if the boss were female?
You would only change the first word to A. The noun chefe is invariant, meaning its spelling doesn't change based on gender. To show whether a boss is male or female, you just change the article before it: O chefe (male) or A chefe (female). Learn O chefe está de mau humor hoje and more in Portuguese
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