Finally, and as a general rule in language learning, novel vocabulary items or grammar points should be introduced in small samples and reinforced through repeated exposure so as not to overwhelm the learner. Nation (2001) suggested that frequency of the items chosen to study should also be kept in mind to maximize the benefits of the learning process, and so more frequent vocabulary items should take priority in language teaching before less frequent ones are introduced.

To sum up, second language learners will require less effort when recognize and remember new words, if they have a good mastery of word formation 

Finally, and as a general rule in language learning, novel vocabulary items or grammar points should be introduced in small samples and reinforced through repeated exposure so as not to overwhelm the learner. Nation (2001) suggested that frequency of the items chosen to study should also be kept in mind to maximize the benefits of the learning process, and so more frequent vocabulary items should take priority in language teaching before less frequent ones are introduced.

To sum up, second language learners will require less effort when recognize and remember new words, if they have a good mastery of word formation