This document discusses the differences between countable and uncountable nouns in English and how they affect article usage. It explains that "a" or "an" is used with singular countable nouns, while "some" and "any" can be used with both countable and uncountable nouns in certain contexts. It also covers quantity expressions like "a lot of", "quite a lot of", "not much/many", "not any" and the questions used to inquire about quantity.

1. SINGULAR PLURAL
COUNTABLES a / an
some
any
UNCOUNTABLES
some
any
some
any

2. DIFFERENCES
a / an
a + consonant
a book
an + vowel
an agenda
some
any
some in
affirmative
sentences
any in negative
and
interrogative
sentences

3. PREGUNTAS
HOW MANY? CONTABLES ¿Cuántos?
HOW MUCH? INCONTABLES ¿Cuántos?
A LOT OF = MUCHO
CONTABLES E
INCONTABLES
AFIRMATIVAS
QUITE A LOT OF = BASTANTE
CONTABLES E
INCONTABLES
AFIRMATIVAS
NOT
MUCH/MANY
= NO MUCHO
MUCH = CONT.
MANY = INCONT
FRASES
NEGATIVAS
NOT ANY = NINGUN
CONT. PLURAL
INCONTABLES
NEGATIVAS