TRABAJAMOS A/AN SOME - ANY

SOME:Se utiliza para oraciones en afirmativa.For example: There are some sugar in the kitchen

ANY: Se utiliza para oraciones en negativa e interrogativa.
For example: There aren`t any rice in the kitchen
Are there any books in the library?

http://www.members.iinet.net.au/~adelegc/grammar/any_some/any_some.html

http://www.autoenglish.org/gr.some.i.htm

http://www.oup.com/elt/global/products/headway/elementary/a_grammar/unit05/hwy_elem_unit05_2/

http://www.englishexercises.org/makeagame/viewgame.asp?id=1657

http://www.angelfire.com/on/topfen/testssomeany2.html

http://www.theyellowpencil.com/tosomeany1.html

http://www.juntadeandalucia.es/averroes/ceip_san_tesifon/recursos/ingles/act_interactivas/cuestionarios/gram_a_an_4_1.html

http://www.english-4u.de/a_an_ex1.htm

http://www.english-4u.de/a_an_ex2.htm

http://www.english-4u.de/a_an_ex3.htm

http://www.english-4u.de/a_an_some_ex1.htm

http://www.english-4u.de/a_an_some_ex3.htm

http://www.english-4u.de/a_an_some_ex4.htm

http://www.english-4u.de/a_an_some_ex5.htm

http://www.english-4u.de/a_an_some_ex6.htm

http://www.english-4u.de/a_an_some_ex2.htm

http://a4esl.org/q/h/9807/km-thereisare.html

http://www.tcet.com/eaonline/GrammarCentral/thereis.html

http://www.tcet.com/eaonline/GrammarCentral/negativeforms.html

http://www.tcet.com/eaonline/FlashedESL/fe-thereisare.html