Forming plurals in Spanish is very easy … as easy as following the following rules:
If the word ends in a vowel you need to add an S. El libro >> Los libros.
If the word ends in consonant you need to add ES. La canción >> Las canciones.
But, as it is usual in Spanish…There are some exceptions!
Look at this resource and watch the video and you won’t have any problems forming the plural in Spanish ever again!