Looking on the internet deeply has found these results:

How could you forget this is the most popular phrase on the web.

How can you left out this 10 results on the web	How could you forget this 11,110 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Oct 1, 2015 ... Those days were forever. You said believe in fate. You said believe and see. It was not so right. How could you forget this. How could you forget�... Nov 22, 2015 ... Tell me how could you forget this lovely four years. Tell me how? Tell me how? This terrible city among those candles, This bloody chirstmas�... Jun 21, 2014 ... How could you forget this? Love it! "@noodlerella: Harley Quinn cosplay photo I forgot to post!!! Ly ? ? pic.twitter.com/wJUKUnPHsb". Nov 4, 2015 ... UnfurltheSquirrel. gasp How could you forget this one? ... UnfurltheSquirrel. * gasp* How could you forget this one?

How can you left out this

10 results on the web

How could you forget this

11,110 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Oct 1, 2015 ... Those days were forever. You said believe in fate. You said believe and see. It was not so right. How could you forget this. How could you forget�...
Nov 22, 2015 ... Tell me how could you forget this lovely four years. Tell me how? Tell me how? This terrible city among those candles, This bloody chirstmas�...
Jun 21, 2014 ... How could you forget this? Love it! "@noodlerella: Harley Quinn cosplay photo I forgot to post!!! Ly ? ? pic.twitter.com/wJUKUnPHsb".
Nov 4, 2015 ... UnfurltheSquirrel. *gasp* How could you forget this one? ... UnfurltheSquirrel. * gasp* How could you forget this one?