Nguyen Bang and Nguyen Ba Ngoc (2002, p.
36) classify vocabulary into receptive and productive vocabulary. The receptive vocabulary refers to learner’s understanding of vocabulary when he hears or reads it. In other words, it is words that learners recognize while hearing, listening or reading. Receptive vocabulary denotes the understanding of words or phrases in verbal or written scenarios.Belisle (2007, p.64) also states that productive vocabulary is what learners can use effectively in communication to express their ideas.2.2 Passive vocabulary : refer to words that learner understand but not really able to use.2.3 Active vocabulary :is the words that learner’s understand and use in