Where were they 3 hours ago?
They were in Taipei.
Where are they now?
They are in Kaohsiung.
Are they busy?
Yes, they are.
Are Fred and Ruby in Japan?
No, they aren't.
Where are they now?
They are in Taiwan.
Where are Fred and Ruby going?
They are going to Kaohsiung.
Where were they one hour ago?
They were in Taichung.