Re: Hello，teachers！What's the different between clean out and clean up?
Cleaning up means to make things tidy and clean.
Cleaning out usually involves removing things.It could mean to empty it completely.
Clean out this closet -- remove all the things we don't use.
If I clean out my savings account, I remove all my money.
Let me clean out this drawer for you -- I will remove everything so that you can use it for your things.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.