This document provides a brief overview of grammar rules for using articles (a/an) before nouns based on their sound. It explains that "a" is used before consonant sounds and "an" is used before vowel sounds, but articles are not used with plural nouns. Examples are given to illustrate these rules for both singular and plural nouns.

1. Contents:
*Vocabulary of Jobs
*Present Simple
*Adverbs of time
*Time expressions

4. Use a+singular noun Use an+singular noun before
before a consonant sound vowel sound.
-He is a teacher -He is an architect
-He is a good teacher -He is an expensive architect
Do not use a or an + plural nouns.
-They are good carpenters
-They are expensive architects