"She reads after lunch."
Translation:Sie liest nach dem Mittagessen.
"Nachdem" for introduction of a situation. "Nachdem ich dir es erzählt habe,bist du gegangen." " Ich bin erst ins Bett gegangen nachdem ich mir die Zähne geputzt habe."
"Nach dem" is a preposition and article. "Nach dem Abendessen ging es mir nicht gut. Ich habe dich nach dem Schlüssel gefragt."
In English, I think, we'd say "She reads after the lunch." if we were referring to a particular lunch, especially one that was a special event (like a lunch hosted by some group). "She reads after lunch." would usually imply a standing disposition to read after lunch every day. We'd also probably drop the 'the' for a particular lunch that wasn't special. But how would German mark the difference between a one-time plan to read after lunch and a daily practice?
Hellouuu to all of you language-nerdy nice people!! Nach is a preposition, and nachdem is a subordinating conjunction. That means that nach comes before a noun, and nachdem introduces a dependent clause. For example, if we want to say "After lunch, they went to the museum" (Nach dem Mittagessen, ...) we should replace "after" with "nach", but if we want to say "After we had lunch, we went to the museum" (Nachdem Mittagessen hatten wir, ...) we should replace "after" with "nachdem". BUT, I don't know if this is a rule for all german dialects, the least or the most spoken one, or even if it's true at all. I just found this info on the site: http://marathonsprachen.com/nach-vs-nachdem-vs-nachher-whats-the-difference/comment-page-1/. BUT, to be more sure about the info on this site, I found that "Nach dem Mittagessen hatten wir" and "Nachdem Mittagessen hatten wir" had approximately the same quantity of results on the web (tried this on googlebattle.com !!). I know this is not an official and authorized german grammar rule, but sometimes rules change if a lot of people start changing the "right way" of talking or writing. Anyway, it would be good if a language eminence or authority (or if someone knows an official german language website) could tell us the correct use of nach dem/nachdem, just to know how we should write, although a lot of people is doing it in a different way. CU !!