than
– used as a comparison
Example :
older than I am
easier said than done
;
rather than
other than
then
– at that time , that time or at the time mentioned
Example :
Mom will be home at noon, but I’ll be home before then.
Dad is coming home early today. Only then we would start playing.
Back then, my brothers fight a lot.
– indicates what happens or what happened next or what should be done next
Example :
I bought a pen, and then a paper.
Do your homework, and then you can watch tv.
First take off the sticker, then wipe it.
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