Common Mistakes : Congratulation

noun

.BAD: Congratulation! You must be feeling very proud
.GOOD: Congratulations! You must be feeling very proud

:  Congratulations is a plural noun
.Many congratulations to you both. I’m sure you’ll be very happy together
.Give them our congratulations and say that we’ll be getting in touch soon

.BAD: Congratulations for your splendid examination results
.GOOD: Congratulations on your splendid examination results

: (congratulations on (doing ) sth (NOT for
.Congratulations on your promotion. You certainly deserve it