take it for granted
US /teɪk ɪt fɔːr ˈɡræn.tɪd/
UK /teɪk ɪt fɔːr ˈɡræn.tɪd/

1.
当たり前だと思う, 当然のことと考える
to fail to appreciate someone or something because you are too familiar with them and do not realize how important or valuable they are
:
•
Don't take it for granted that she'll always be there for you.
彼女がいつもそばにいてくれることを当たり前だと思ってはいけない。
•
We often take our health for granted until we get sick.
私たちは病気になるまで、健康を当たり前だと思ってしまいがちだ。