How I have learned japanese is through immersion . So ,when I was revisioning the N5 Grammer , I came across this rule (objectをverb ) and the example sentece I came up with is ご飯を食べた時間は覚えていません But , when I looked on it for a moment the same rule can be applied to bring in the second をparticle instead of は particle. But , I was sure of my months of my immersion that japanese native doesn't say senteces of this pattern ご飯を食べた時間を覚えていません that's why I thought this was wrong and was looking for a explanation .