a. Keep an eye on - To watch or monitor closely.
Example: "Could you keep an eye on my bag while I go grab a coffee?"
b. Get cold feet - To suddenly become nervous or hesitant about something.
Example: "He got cold feet and backed out of the bungee jumping experience."
c. Put your foot in your mouth - To say something embarrassing or tactless.
Example: "I put my foot in my mouth by accidentally revealing her surprise party."
d. Shoulder the burden - To take responsibility or handle a difficult situation.
Example: "She willingly shoulders the burden of taking care of her elderly parents."
e. Head over heels - To be deeply infatuated or in love with someone.
Example: "They fell head over heels for each other at first sight."