INDEFINITE ARTICLES A / AN We use a / an to refer to singular countable nouns. Examples There is a new English teacher in my school, Julia is reading a book. Other rules Examples: We use a before words that begin with a consonant sound or a semi-vowel (y, w). There is a book on the table. a Joshua is a university student. They have a year to study for the exam. Mr. Moura is a history teacher We use an before words that begin with a vowel sound. Is English an easy language for you? She studies for an hour every day. 1) Write a or an inglês a) b) c) d) e) f) g) interesting class school director science lab auditorium English lesson large swimming pool football stadium.alguem pode me ajudar​