"Keep an eye on"
A: Can you keep an eye on the kids for a minute?
B: Sure, no problem.
Keep an eye on your wallet, there are lots of thieves around here.
A: Would you mind keeping an eye on my house while I go on holiday?
B: Yes, of course!
What does "Keep an eye on" mean?
We use 'Keep an eye on' to mean carefully watch.
We often use it when we talk about looking after important things like children, the time or expensive items.
It doesn't mean we actually we are looking the whole time!