She tried to catch him out,
without him catching on,
but she never caught him at it.
catch
He had to catch up on his homework,
but he was caught up in the video game.
Then his mum caught him at it.
Destiny had caught up with him.
catch caught caught
When she caught him at it,
she finally caught on.
He was too caught up to notice,
so she let him catch it, but good!
The cat caught up with the mouse.
The mouse never caught on.
The cat ate the mouse.
Phrasal Verbs - By Example 