Oh lord. Are you seriously telling me you have never heard the saying "After so and so?"
Let's not get into semantics. It's understandable that the capability to understand a simple sentence is not there, but it's best to try to cope with reading more, listening (especially listening), maybe watching a bit more television. Just to increase your readership ability in the English language.
It's well known that the U.S. Education system is failing to teach it's graduates the means of understanding the English language, but I hope readers such as yourself have had a higher education...but if the latter is true, then I would go back and complain to your teachers that they weren't able to teach you basics of the language and/or corrected you when you made the mistake.
Good luck !