Nowadays, society is changing day by day, the need in communicating and
exchanging information, culture, technology and science among countries is
becoming greater, English language as a common means of communication has
become increasingly important.
In the English language, there are many fields in which each is studied
by different linguists. Lexicology, which is considered an importan t branch of
English language, has also been investigated and studied by many linguists. In
fact, there are many problems for the learners of English as an international
language. Among them colloquialism causes a lot of troubles.
Colloquialism is one of lexicology phenomenon which is one of the
most commonly used in conversations, so it is necessary to work in depth
with its features.
In conversations, colloquialism becomes very useful because it not only
saves time but also helps the hearer understand easily. Though colloquial
words are used quite popularly in daily conversations, they belong to a new
lexicology phenomenon for Vietnamese leaner of English because it has been
studied insufficiently.