"I should read the article."
Translation:Yo debería leer el artículo.
Perhaps they are requiring the yo because it could be either 1st or 3rd person singular? However, I reported it.
It is about consistency. Either they let us omit subject pronouns every time, or they require them every time there could be confusion. But not randomly require a pronoun one time out of twenty. In cases like this, as explained to me by a native speaker, in the absence of prior context, the assumption is yo, and if you want third person you put in the pronoun. If you omit it the yo is assumed in the absence of prior or following clarification.
Thanks for the link, but I am still none the wiser. It said that both forms are used, especially in the example given "¿Qué debo comer? " vs. "¿Qué debería comer?". I had typed "debo" in this question, and was looking for answers as to why it was wrong. Conclusion: only slightly wrong. Like "quisiera" or "gustaría". So tricky.
"Yo" doesn't have to be present. Therefore: "debería leer el artículo" as suficiente!
16 Jul 2018 - Duo is still rejecting the translation if the "yo" is missing. The sentence is correct with or without the 'Yo". Duo please review. Thank you.
Duo should notice this error when statistically there are a number of "wrong" attempts at this sentence, followed by it being reported wrong. So keep on entering the correct translation and then always report it afterwards.
In this case the sentence was rejected on account of the personal pronoun "yo" being left out. Yet, in the same unit and on the same day, "entonces él debe ser detenido" was also rejected on account of the personal pronoun "él" being included. Duo, such inconsistencies do not inspire confidence; kindly review those sentences and accept them with and without the personal pronouns. Thank you.