Breakdown of O engenheiro detetou uma anomalia num parâmetro do teste.
de
of / from / by (means of transport) / wearing (attire)
um
a / an / some (all forms)
em
in / on / at
o
him/it (m)
Questions & Answers about O engenheiro detetou uma anomalia num parâmetro do teste.
Why is it spelled detetou instead of detectou?
In European Portuguese, the 'c' in the verb detetar is silent, so it was dropped under the latest spelling agreement (Acordo Ortográfico). You might still see detectou in older texts or in Brazilian Portuguese, where the 'c' is often pronounced.
How could I add de facto to this sentence to emphasize that the anomaly was indeed found?
You have a few natural options. You could place it at the beginning (De facto, o engenheiro detetou...), right after the verb (O engenheiro detetou, de facto, uma anomalia...), or at the very end (...num parâmetro do teste, de facto.). Placing it directly after the verb is a very common way to confirm the reality of the action in written and spoken Portuguese.
Why is the phrasing parâmetro do teste used instead of just putting the nouns together like in English?
Unlike English, which often stacks nouns so the first acts as an adjective (as in "test parameter"), Portuguese requires a preposition to link them. You literally say "parameter of the test", which gives us parâmetro de + o teste, contracting into parâmetro do teste.
Why do we need the contraction num here rather than just the preposition em?