Breakdown of Este candeeiro a petróleo precisa de uma válvula nova.
novo
new / young
um
a / an / some (all forms)
este
this (+ noun)
precisar de
to need
o candeeiro
the lamp
a válvula
the valve
o petróleo
the petroleum
Questions & Answers about Este candeeiro a petróleo precisa de uma válvula nova.
Why do we use a in candeeiro a petróleo instead of de?
The preposition a is used to describe how a machine, vehicle, or device is powered or operated. Just like barco a motor (motorboat) or fogão a gás (gas stove), candeeiro a petróleo tells us the lamp runs on oil. If we used de, it would imply that the lamp itself is physically made out of oil!
Does petróleo mean petroleum or crude oil here?
In a broad, industrial sense, petróleo does mean petroleum or crude oil. However, in the everyday context of household lamps or heaters, it specifically refers to kerosene or paraffin oil. Therefore, a candeeiro a petróleo is a kerosene lamp.
We know the verb precisar requires the preposition de. Can de and uma contract in this sentence?
Why does the adjective nova come after válvula instead of before it?
In Portuguese, adjectives typically follow the noun when they provide distinguishing, objective information—here, specifying that the valve is new, not used or old. Placing an adjective before the noun usually adds a subjective, emotional, or figurative emphasis, which wouldn't make sense for a mechanical part like a válvula.
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