At three o'clock this morning I was sitting in a taxi on the way to the airport.
something happening before and after a specific time
The number of the world's people living in cities is getting bigger and bigger all the time.
something changing or developing
Where on earth are my glasses? I'm always losing them!
something happening again and again
More than 100 people were working in the building when the earthquake struck.
something happening before and after another action
We're staying at the Hotel Clementine, near the town square.
something temporary
I've given up maths. Now I'm studying for a degree in economics instead.
something new
https://339efcb25eb75e967b0d-ff8eeadd950d51fd1fc939dca75b3973.ssl.cf1.rackcdn.com/assets_green.swf