"Sir, are you writing a book?"
Translation:Señor, ¿escribe usted un libro?
The fact that the individual is addressed as 'Sir', implies that it is not a familiar relationship, so Usted is the correct usage, which uses 3rd person.
I have written ' usted escribe un libro' and DL has said this is correct. What is the rule with word order?
usted escribe un libro = escribe usted un libro = escribe un libro usted
Despite Tessa Jade's comment below, she is attributing context to a situation that lacks context. We have only the translation to work with. If the English asks for present continuous, the correct Spanish response should also require present continuous tense. This confuses people who are doing our best to learn difficult verb tensing. DUOLINGO NEEDS TO CORRECT THIS ERROR.
Present tense (indicative) in Spanish means three things.
Yo hablo inglés: I speak English. I do speak English. I am speaking English.
Yo como pan: I eat bread. I do eat bread. I am eating bread.
Yo vivo en Buenos Aires: I live in Buenos Aires. I do live in Buenos Aires.
Indeed. The question, 'Sir, are you writing a book?' implies that it is an action occurring at the time the question is asked. It's difficult to think of a situation where this question would be asked for an activity which is not occurring at the moment.
Usted/ustedes (singular/plural) always takes the ending for the 3rd person conjugation
Can someone clarify why add usted after escribe? I don't know the formal question adds usted after a verb, rather than before.
The correct translation is: "Señor, está usted escribiendo un libro", yet it is marked as wrong. Learn how to conjugate verbs, Duolingo.
In English, we can use the present continuous tense to talk about activities that are on-going, but that we aren't necessarily doing at that moment. However, in Spanish, this is not the case. In Spanish the present continuous is reserved for whatever action you are completing in that precise moment. For example, in English, it would be common to say "I am working at the supermarket," to one of your friends when you are not actually on the clock. But, if you are speaking Spanish and you say, "Estoy trabajando en el supermercado," that would actually mean that you are on the clock working at that moment. Check out LightSpeedSpanish on youtube - they have some great videos explaining grammar concepts like this. Their videos are very succint and to the point - about 10 minutes each!
For some reason duolingo is putting in a lot of continuous progressive sentences and asking for a present indicative answer!