Breakdown of O movimento do ombro volta a ser normal.
ser
to be
de
of / from / by (means of transport) / wearing (attire)
a
to / at (direction)
voltar
to return
Questions & Answers about O movimento do ombro volta a ser normal.
How does volta a ser mean 'is normal again'?
Why does the Portuguese sentence use do ombro instead of just translating 'shoulder movement' directly?
Why use ser (to be) instead of estar if the shoulder's condition was recently different?
In Portuguese, being 'normal' is almost always treated as a core characteristic or the baseline state of a thing, which requires ser. Even though the shoulder was injured or abnormal for a while, its fundamental, natural state has now been restored.
Could I just use a word like novamente (again) instead of the voltar a structure?
Yes, you could say O movimento do ombro é normal novamente or é normal outra vez. However, using voltar a + infinitive is a very common and natural Portuguese phrasing that native speakers use all the time to express repetition or returning to a previous state.