1) The document discusses word formation in English through prefixes, suffixes, and compounding. It provides examples of common prefixes and suffixes and how they can change the meaning of words.
2) Prefixes are added before root words and can indicate negative meanings, numbers, or directions. Examples of prefixes and their meanings are given.
3) Suffixes are added after root words to form new words by changing word classes or adding specific meanings. Noun, verb, and adjective suffixes are outlined.