Learn Portuguese (Portugal): É possível que o laboratório feche cedo. - It is possible that the laboratory closes early.

The phrase É possível que (It is possible that) expresses doubt or uncertainty. In Portuguese, this triggers the subjunctive mood in the following verb. So, the regular present tense fecha becomes the present subjunctive feche.

How do we form the present subjunctive for fechar in this sentence?

For regular -ar verbs like fechar, you start with the present tense eu (I) form, which is fecho. You drop the final -o and add the subjunctive endings. Since o laboratório is a third-person singular subject (it), we add the ending -e to get feche.

Could I drop the word que like we often do in English?

No, you cannot drop que in Portuguese. While in English you can say 'It is possible the laboratory closes early', Portuguese strictly requires que to connect the main clause (É possível) to the subjunctive clause.

Does the word cedo change if we talk about multiple laboratories?

No. Cedo means 'early' and functions as an adverb here, describing when the lab closes. Adverbs are invariable in Portuguese, so they never change to match gender or plural forms.