“Why don't I hang on to that for you.”
You're travelling to another country with your boyfriend. When you got to the airport, he wasn't able to find his passport. You both got worried, but after searching for a few minutes he found it. You're worried that he'll lose it again, so you offer:
Why don't I hang on to that for you?
losing something,
offer,
phrasal verb,
suggestion,
日本語サポート 

