Nouns in Spanish
Nouns have number: they can be singular (one) or plural (more than one). In order to make them plural, we add -s at the end, or -es if the noun ends in a consonant. Guitarra → Guitarras. Doctor → Doctores.
Nouns in Spanish have gender (they can be either masculine or feminine). A piano (piano) is masculine, while a guitarra (guitar) is feminine. Notice how piano ends in -o and guitarra ends in -a. It is quite common for masculine and feminine nouns to end in those letters respectively, but it is not a rule. So, in order to memorize the gender of nouns, we are going to learn all of them together with the article.