We use the quantifier more to talk about additional quantities, amounts and degree. More is a comparative word.
More with nouns, adjectives, adverbs, verbs, prepositions
We use more with different classes of words. We use more after verbs but before every other word class:
[instructions on a computer screen]
Click here for more answers. (more + noun)
My father was more upset than I had ever seen him. (more + adjective)
The interest rate has gone up again. We’re going to have to pay more. (verb + more)
[talking about a car]
It will start more easily, run more smoothly and deliver more power. (more, + adverb, more + adverb, more + noun)
Who’s more in need of a good night’s sleep, you or me? (more + prepositional phrase)
More with nouns
We can use more with plural countable nouns and uncountable nouns:
There are more chairs in the room opposite if you need them. (countable)
We need more information before we can make a decision. (uncountable)
When we use more before articles (a/an, the), demonstratives (this, that), possessives (my, your) or pronouns (him, it), we need of:
Can I have more of that delicious cake you baked?
How many more of my relatives have you not met, I wonder?
I think we’re going to see a lot more of her.
More without a noun (as a pronoun)
We usually leave out the noun after more when the noun is obvious:
I’d like some coffee. Is there any more? (more coffee)
More and more
We often use more and more to emphasise an increase or decrease in something:
More and more people are using the Internet every day.
More or longer?
When we are talking about more time, we usually use longer rather than more:
Would you like to stay a bit longer?
Would you like to stay a bit more?