IT’S UP TO YOU
This is such an easy little phrase to learn and ever so useful.
Meaning 1: You can decide, you can choose
“Which film shall we see?” – “I don’t mind. It’s up to you.”
“We can do the class at 10 or 11. It’s up to you.”
Meaning 2: It’s the responsibility of somebody (often to emphasise that it’s not somebody else’s responsibility)
I can’t study for you. It’s up to you to take the exam.
It was up to you to get dinner ready. I asked you, not your sister.
“It’s not up to everybody else to take care of our planet. We all have to do our part.”