Breakdown of A médica não trabalha na quarta-feira.
não
not / no
a médica
the doctor (f)
em
in / on / at
trabalhar
to work
Questions & Answers about A médica não trabalha na quarta-feira.
Why do we use na before quarta-feira to say "on Wednesday"?
In English, we say "on" a day, but in Portuguese, you use the preposition em (in/on/at) plus a definite article (the word for "the"). Because all weekdays ending in -feira are feminine, you combine em + a to make na. You are essentially saying "in the Wednesday".
Do I always have to say the -feira part of quarta-feira?
In everyday spoken Portuguese, people often drop -feira and just say quarta if the context is clear. However, it is good to learn the full name first, as you will see it written out on official schedules, signs, and calendars.
How do we know from this sentence that the doctor is a woman?