Indefinite Articles

You will study Indefinite Articles.


Indefinite Articles

New Mexico

Instructions: Look at the underline words in the following paragraph:

The U.S. acquired most of New Mexico in 1848, as a result of a war. Union troops captured the territory from the Confederates during the Civil War. With the surrender of an indigenous called Geronimo in 1886, the Apalache Wars and most of the Indian conflicts in the area were ended.


Getting started: More about New Mexico

Instructions: Read more information about the Hispanic population in the US, and match the sentences.

Francisco Vásquez de Coronado, a Spanish explorer searching for gold, traveled the region that became New Mexico in 1540-1542. In 1598 the first Spanish settlement was established on the Rio Grande River by Juan de Oñate. In 1610 Santa Fe was founded and made the capital of New Mexico. Since 1945, New Mexico has been a leader in energy research and development with extensive experiments conducted at Los Alamos, Scientific Laboratory and Sandia Laboratories in the nuclear, solar, and geothermal areas.

New Mexico. Retrieved and adapted September, 2016 from

1. Francisco Vasquez de Coronado was

2. The first Spanish settlement was established

3. Juan de Oñate was

4. Santa Fe was founded

5. New Mexico has

in 1610
many scientific laboratories.
from Spain
in 1598
the founder of the first settlement

Indefinite Articles

Let’s study Indefinite articles.

Instructions: Look at the following information about Indefinite Articles:

What is an article?

Articles are words used to define nouns as specific or unspecific.

A or AN are used before nouns that introduce something or someone NOT mentioned before. A / AN is always singular.

Examples: He is a lawyer.

  • She is an architect.
  • The Mediterranean is a sea, not an ocean.

We use “a” if the word after it starts with a consonant sound. Example:

  • a city
  • a factory
  • a hotel

We use “an” if the word after it starts with a vowel sound. Example:

  • an elephant
  • an apple
  • an engineer

We use “a” or “an” before jobs. Examples: a teacher; an engineer.

Be careful with words like “university” and “hour”. We say “university” with a “y” sound. So “a university” is correct.

We say “hour” with a silent “h”. So, “an hour” is correct.


A or AN

Instructions: Write a or an before the following nouns:

  1. hispanic
  2. American
  3. student
  4. school
  5. teacher
  1. architect
  2. doctor
  3. engineer
  4. boy
  5. apple


What’s the article?

Instructions: Drag and drop the best article for the following text:


New Mexico has area of 121,412 square miles. The eastern border of New Mexico is Texas. On the southern border, Texas makes up the eastern two-thirds, while the Mexican states of Chihuahua and Sonora make up the western third. The western border runs with Arizona.  The southwestern corner of the state is Colorado. Although large state, New Mexico has very little water. Its surface water area is about 250 square miles.


Flora and Fauna in New Mexico

Instructions: Write “a” or “an”. Remember the rules. Click on CHECK to evaluate your answers.

New Mexico contains extensive habitat for many plants and animals, especially in desert areas. The northern portion of the state is home to many tree species such as ponderosa pine, aspen, and Russian olive, which is invasive species. Native birds include the greater roadrunner and wild turkey. Other fauna present in New Mexico include black bears, cougars, jaguars, coyotes and multitude of other birds, reptiles and rodents.