Question

1. My family used to live in Seoul.
2. My family used to live in the city, Seoul.
3. My family used to live in Seoul, the city.
(Are the three sentences all grammatical?)
Yes, they are. To define Seoul as a city seems redundant, however. You might better say "the City of Seoul" if you are unsure your reader knows that Seoul is a city and not a sea or a lake. :)

Related Questions

1. Seoul is the city. My family used to live in Seoul. 2. Seoul is the city where my family used... Posted by rfvv on Tuesday, October 11, 2016 at 5:39pm. 1. Seoul is the city. My family used... What is the main idea behind the Daoist religion?(1 point) Responses Family should be put above... A family group in which many generations live together in one home is known as a(n) __________. A....