From Longman Dictionary of Contemporary EnglishI forgetI forgetFORGETused to say that you cannot remember a particular detail about somethingI forget what/where/how etc I forget what he said exactly but it was very rude.I forget the name/details etc I forget the name of the street, but it’s the first on the left. → forget
Examples from the Corpus
I forget what/where/how etc• He said something - I forget what, but it was pretty clear he didn't trust me.• A head of lettuce, a couple of potatoes, I forget what else.• But at the time I was so excited by my good luck that I forgot what I owed to Joe.• Soon I forgot what I used to think, so comparisons were hard.• The first time I got outside I almost cried because it felt so good. I forgot what it felt like.• I fired again, calm and yet so full of fear, so full of fear I forget how often I fired.• He picked up some notes as well. I forget what they were for.• Nothing, nothing, nothing. I forget how to make the words come out of my mouth. 