take for granted
US /teɪk fər ˈɡræn.tɪd/
UK /teɪk fər ˈɡræn.tɪd/

1.
to fail to appreciate someone or something
:
•
Don't take for granted the people who love you.
•
We often take for granted the simple things in life.
2.
to assume something is true without question or proof
:
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I just took for granted that he would be there.
•
Don't take for granted that everyone knows the rules.