More is the comparative of much and many. It indicates a greater number or quantity of something.
- We need more money.
- This problem is more complex than the other.
- You need more sleep.
We use more of before a pronoun, a geographical name or a noun with a determiner.
- He is more of a fool than I thought.
- Can I have more of that cheese?
- I would like to see more of Canada.
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