... http://www.ebook.edu.vn 175 (5) ‘I walked to school every day.’ (6) ‘Tomorrow is a holiday.’ 4 .7. 3 Complexity in the use of deictic expressions 4 .7. 3.1 As for the first person plural in (7) , “there ... different meanings and written forms. 9. An ________ is the use by a particular speaker, on a particular occasion, for a particular purpose, of a piece of language, such as a sequence of sentences, ... expressions are also sometimes called indexicals.” [Yule, 1996: 9] 4 .7. 2 Classification http://www.ebook.edu.vn 176 4 .7. 3.4 Then applies to both past in 10(a) and present in (10)b time...