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there is, es como si en español dijeras HAY (conjugacion del verbo "haber") y lo utilizas para referirte a algo en SINGULAR.Por ejemplo: THERE IS a car in thegarage(HAY un coche en el garage)

en este caso se utiliza cuando te refieres a PLURALES. por ejemplo: there are apples on the table. (Hay manzanas sobre la mesa).Basicamnete la diferencia radica en que uno se utiliza para plural y otro para singular.
There is, it's like you said in Spanish HAY (conjugation of the verb "have")and use it to refer to something in SINGULAR.Por example: THERE IS a car in the garage (there is a car in the garage)

  in this case is used when you refer toplural. For example: there are apples on the table. (There are apples on the table).
Basicamnete the difference is that one is used for singular and one plural.http://html.rincondelvago.com/gramatica-inglesa_11.html
http://es.answers.yahoo.com/question/index?qid=20081006204729AAiwe0Whttp://www.saberingles.com.ar/curso/lesson05/04.htmlhttp://translate.google.com.mx/?hl=es&tab=wT#es|en|there%20is%2C%20es%20como%20si%20en%20espa%C3%B1ol%20dijeras%20HAY%20(conjugacion%20del%20verbo%20%22haber%22)%20y%20lo%20utilizas%20para%20referirte%20a%20algo%20en%20SINGULAR.Por%20ejemplo%3A%20THERE%20IS%20a%20car%20in%20the%20garage(HAY%20un%20coche%20en%20el%20garage)%0D%0A%0D%0A%20en%20este%20caso%20se%20utiliza%20cuando%20te%20refieres%20a%20PLURALES.%20por%20ejemplo%3A%20there%20are%20apples%20on%20the%20table.%20(Hay%20manzanas%20sobre%20la%20mesa).%0D%0ABasicamnete%20la%20diferencia%20radica%20en%20que%20uno%20se%20utiliza%20para%20plural%20y%20otro%20para%20singular.%0D%0A