There is ; There are

http://www.ejerciciodeingles.com/cuando-usar-there-is-there-are/
http://www.isabelperez.com/happy/tenses.htm
http://www.ingles-practico.com/basico/hay.html
http://www.wordreference.com/es/translation.asp?tranword=there
http://www.merriam-webster.com/dictionary/theres