An interesting map

1. A

1.1. -singular noun -starts with a vowel

1.1.1. Examples

1.1.1.1. a cat

1.1.1.2. a dog

1.1.1.3. a pig

1.1.1.4. a house

1.1.1.5. a student

1.2. Use "a" for words that start with "u" if they make a "you" sound

1.2.1. Examples

1.2.1.1. a utopia

1.2.1.2. a united team

1.2.1.3. a unique shirt

2. Kevin Ramos

3. Learn English: a or an? which one?

4. Examples

4.1. an honest man

4.2. an hour

4.3. an honor

5. Examples

5.1. an orange

5.2. an apple

5.3. an octopus

5.4. an egg

6. AN

6.1. -Singular Noun -Starts with a vowel

6.2. Use "an" for words in which the "h" is not pronounced.

7. http://www.theenglishstudent.com/uploads/2/4/1/5/24150879/7692544.png?380