Should you use any more, or anymore? This is a question that often stumps me, and I have to go away and check mid-sentence. I can never seem to remember the rule when I’m actually writing something. I know that some of you probably think it doesn’t matter, but I like to get things right if I can.
Here’s a great explanation I found on the Grammarly blog.
Any more and anymore have related meanings, but they’re not interchangeable. Any more refers to quantities - would you like any more tea? Anymore is an adverb that refers to time - I don’t like tea anymore.
https://www.grammarly.com/blog/anymore-vs-any-more/
If you can substitute the words “any longer”, then it’s one word as in “I don’t like biscuits anymore”. (Not true, by the way).