more

more (of)

We can use more as a determiner before uncountable or plural nouns. Before another determiner (article, possessive, etc) or a pronoun, we use more of. Compare:

• We need more butter.
  We need more of that salted butter.
  We need more of it.
• More climbers have been found.
  More of the missing climbers have been found.
  More of them have been found.

However, more of can be used directly before personal and geographical names.

• It would be nice to see more of Ray and Barbara.
• Five hundred years ago, much more of Britain was covered with trees.

more without a noun

We can drop a noun after more if the meaning is clear.

• I’d like some more, please.

one more, etc

Note the structure one more, two more, etc. In this case more can be used before a countable noun.

• There’s just one more river to cross.

more as an adverb

More can also be used as an adverb.

• I couldn’t agree more.

More and more is used to talk about continual increase.

• I hate this job more and more as the years go by.

note

For more in comparatives (e.g. more comfortable), Comparison.

For no more, not any more/longer, (see here).

For far more, much more, many more, etc, (see here).