Articles

Acontinuación les dejo las definiciones de los articulos, espero que les sirva mucho y estudien mucho.

• Definite article
  For singular and plural, feminine and masculine
  
  THE. - el, la, los, las.
  
  Examples:
  
  1. The car, The house, The students
  
• Indefinite article
  For a singular only, feminine and masculine.
  
  A.- un, una
  
  (preceding a consonat sound)
  
  Examples: A pencil, a pen, a uniform, a hippopotamus, a hotel.
  
  AN.- un, una
  
  (preceding a vowel sound)
  
  Examples: An apple, an orange, an honor, an honest person.
  
• Demostratives: Singular
  
  THIS.- este, esta
  
  Examples: this book, this classroom
  
  THAT.- ese, esa, eso, aquel, aquello, aquella.
  
  Examples: that student.
  
• Demostratives: Plural
  
  THESE.- estos, estas.
  
  Examples: these classes, these teachers.
  
  THOSE .- esos, esas, aquellas, aquellos.
  
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  PLURALS
  
• Regular nouns, form their plural form by adding an "s"
  
  Examples:  one classroom/ two clasrooms
                     one student, / two students
                     one dog / two dogs
  
• Nouns ending in: S-SS-SH-CH-Z-X-O
  The form their plural by adding "es"
  
  Examples:  Bus/Buses
                     brush/brushes
                     watch/watches
                     buzz/buzzes (zumbido/murmullo/cuchicheo/sonido del teléfono)
                     box/boxes
                     tomato/tomatoes
  
• Foreing or abbreviated words ending in "o" add "s" only
  
  Examples: Piano/pianos
                    photo/photos
  
• Nouns ending in "y" preceded by a consonant change the "y" into "i" and andd "es"
  
  Examples: Fly/Flies
                    lorry/lorries (camión)
                    party/parties
                    country/countries
  
• Some nouns ending in "f" or "fe"change the "f" of  "fe" to "ves"
  
  Examples: wife/wives
                    knife/knives
                    life/lives
                    self/selves
                    shelf/shelves (estante, repisa, anaquel, saliente)
                    thief/thieves  (*Ladrón)
                    wolf/wolves (*lobo)
                    loaf/loaves (barra de pan)
                    leaf/leaves (hoja de arbol)
                    half/halves (mitad, medio)
                    calf/calves (becerro, ternero, cria)
  
• The nouns:
                    scarf/scrafs or scraves (bufanda/perforar la pared/comer rapido)
                    wharf/wharfs or wharves (muelle)
                    hoof /hoof or hooves (aro/arco)
  are either written with "s" or "ves"
  
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  PLURAL IRREGULARS
  
• some nouns have irregular forms. study them
  
  Examples: man/men
                    ox/oxen (bueyes)
                    foot/feet (pies)
                    woman/women
                    fish/fish
                    goose/geese (gansos)
                    gentleman/gentlemen (caballeros)
                    sheep/sheep (*ovejas)
                    louse/lice (piojos)
                    child/children
                    deer/deer (renos)
                    salmon/salmon
                    mouse/mice (ratones)
                    tooth/teeth (*dientes)
                    trout/trout (truchas)