Breakdown of Tens de rodar a peça, senão o calor estilhaça a bolha.
ter de
to have to
o
him/it (m)
a peça
the part
o calor
the heat
senão
otherwise
a bolha
the bubble
estilhaçar
to shatter
rodar
to rotate
Questions & Answers about Tens de rodar a peça, senão o calor estilhaça a bolha.
Why is senão written as one word here instead of two (se não)?
As a single word, senão means 'otherwise' or 'or else', which fits perfectly here. If written as two words (se não), it means 'if not' and introduces a conditional clause, which would usually be followed by a verb, as in se não rodares a peça (if you do not rotate the piece).
Why does the sentence use the present tense estilhaça instead of a future tense like vai estilhaçar?
In Portuguese, the present tense is frequently used instead of the future tense to express an immediate, highly certain consequence. Using estilhaça makes the warning sound much more urgent and inevitable than using a future form like vai estilhaçar.
Is there a difference between using tens de and tens que to say you have to do this?
Traditionally, ter de expresses a strong obligation (you must do it), which is exactly what is needed here to avoid breaking the bubble. Ter que technically implies having something available to do. However, in modern everyday spoken Portuguese, native speakers often use both interchangeably for obligations.
Could I use girar instead of rodar to mean rotate here?
Yes, both mean 'to turn' or 'to rotate'. Rodar is very common for turning an object on its axis manually, like a piece of glass you are shaping. Girar works perfectly well too, though it is sometimes associated with faster, continuous spinning.
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