Breakdown of Elas têm doze cadernos no quarto.
elas
they (f)
ter
to have
o caderno
the notebook
no
in the / on the / at the (m, f, pl forms: na, nos, nas)
Questions & Answers about Elas têm doze cadernos no quarto.
Why does têm have a circumflex accent (^) on it?
Why does the sentence start with Elas instead of Eles?
Elas means 'they' for an exclusively female group. If the group of people having the notebooks included even one male, or if we did not know their genders, we would use the masculine form Eles.
I learned that em means 'in'. Why does this sentence use no quarto?
Does the number doze change if the items are feminine?
No. Unlike the numbers one (um or uma) and two (dois or duas), the number twelve (doze) has only one form. It stays exactly the same whether it is describing masculine nouns like cadernos or feminine nouns.