The document discusses the indefinite articles "a" and "an" and their grammatical uses with singular nouns. It states that these articles are used to introduce a noun, show membership in a group, or generalize about a class. Examples are provided that introduce a noun ("an Englishman"), show membership ("a military officer"), and classify ("an octopus").

1. Native English Natural Grammar

2. A / An Indefinite Article Used with singular nouns Uses: To introduce a noun To show membership in a group To generalize about a class Examples: Introduce: An Englishman was on a plane Membership: That man is a military officer. Classification: An octopus has eight legs Grammar Patterns

3. A / An Indefinite Article Used with singular nouns Uses: To introduce a noun To show membership in a group To generalize about a class Examples: Introduce: An Englishman was on a plane Membership: That man is a military officer. Classification: An octopus has eight legs Collocations

4. A / An Indefinite Article Used with singular nouns Uses: To introduce a noun To show membership in a group To generalize about a class Examples: Introduce: An Englishman was on a plane Membership: That man is a military officer. Classification: An octopus has eight legs Set Phrases

5. A / An Indefinite Article Used with singular nouns Uses: To introduce a noun To show membership in a group To generalize about a class Examples: Introduce: An Englishman was on a plane Membership: That man is a military officer. Classification: An octopus has eight legs Examples

6. A / An Indefinite Article Used with singular nouns Uses: To introduce a noun To show membership in a group To generalize about a class Examples: Introduce: An Englishman was on a plane Membership: That man is a military officer. Classification: An octopus has eight legs Exercises (link to Quia)