... general rule, if a noun has a definite and identifiable shape, it is a count noun. Let’s look at the rules for the proper use of these nouns. Count nouns (1) can be singular or plural (simply ... be preceded by a number: one, five, etc. One student works hard. Five students work hard. (4) can be preceded by “the,” “a,” and “ an.” The glass is broken. A glass is broken. (5) cannot ... www.tailieuduhoc.org Articles include the words “a,” “an,” and “the.” There are, of course, some specific rules for using these three articles correctly. Let’s look. “A” and “An” are used with...