Used in comparisons, to introduce the basis of comparison.
she's taller than I am; she found his advice more witty than helpful; we have less work today than we had yesterday; We had no choice than to return home
(obsolete outside dialectal, usually used with for) Because; for.
That time
It will be finished before then.
Being so at that time.
(temporal location) At that time.
He was happy then.
(temporal location) Soon afterward.
He fixed it, then left.
(sequence) Next in order; in addition.
There are three green ones, then a blue one.
In that case.
If it’s locked, then we’ll need the key.
(sequence) At the same time; on the other hand.
That’s a nice shirt, but then, so is the other one.
(affirmation) Used to contradict an assertion.