this chapter will deal with grammar in the narrower sense of “the structure of a language” (Richards, Platt and Platt, 1992, p. 161) and as a set of rules that define how words or parts of words are combined or change to form acceptable units which can be used to convey meaning within a language (Ur, 2003). In language teaching, the view that grammar plays a central role in the language curriculum is often firmly held (Purpura, 2004).