Can you keep an eye on my son for an hour while I go out shopping?
Keep an eye on usually means take care of something or someone.
It can also mean watch, in certain contexts. I’m keeping an eye on interest rates, because I want to buy a house.
Keep an eye ON + NOUN
To keep an eye out (for something) means pay attention so you will notice it when you see it.
If I ask you to count how many red cars in a video, you will keep an eye out for red cars. You’ll pay attention and notice when you see them.
Keep an eye OUT FOR + NOUN.
Or just
Keep an eye out (when the context is clear)
A: Do you know any local English teachers?
B: No, sorry, but I’ll keep an eye out and let you know if I meet any!

2 comments
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Very informative