No. 334 in Portuguese
serem
"Serem" is the infinitive form of "ser" (to be) conjugated in the personal infinitive for "they" or "you (plural)."
In a sentence
Eles precisam ser felizes antes de serem saudáveis.
They need to be happy before being healthy.
Here, 'serem' is the infinitive form of 'ser' conjugated to match the subject 'eles' after the preposition 'de'.
Se querem os resultados, as coisas precisam serem feitas com dedicação.
If they want results, things need to be done with dedication.
In this case, 'serem' is used after the verb 'precisam' to describe what things need to be.
As janelas devem serem fechadas ao sair.
The windows should be closed upon leaving.
'Serem' complements the verb 'devem' and is conjugated to align with the plural subject 'as janelas'.
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