From Longman Dictionary of Contemporary Englishtake it for granted (that)take it for granted (that)THINK SO/NOT BE SUREto believe that something is true without making sure He just took it for granted that he would pass the exam. → grant
Examples from the Corpus
take it for granted (that)• But I take it for granted.• It was impossible to take it for granted.• Ludens was right in a way to complain that they were now all taking it for granted.• Why do we take it for granted that education is a good to which everyone equally is entitled?• He seemed to take it for granted that everyone would do what he told them.• Now we took it for granted that seawater came swirling up around our feet whenever we left the cabin or cockpit baskets.• He seemed to take it for granted that she was the one to talk to.• We just took it for granted that the $1000 was part of the normal fee for buying a house.• She had taken it for granted that they would spend the night in Denver. 