At that time; at the time in question. adverb
Back then, I was just starting my career.
She was living in New York then.
After that; next; afterward. adverb
We went to the park, and then we had lunch.
Finish your homework, then you can watch TV.
In that case; therefore. adverb
If it rains, then the picnic will be canceled.
If you are ready, then we can start the meeting.
Used to introduce a statement that logically follows from something previously said or implied. adverb
If you know the answer, then tell me.
So you missed the bus, then you must have been late.