=before names of countries (spain), cities (madrid), mountains (everest), islands (malta) lakes (lake michigan) and continents (europe)
= before the names of meals (lunch) and games/sports (tennis)
= before the word television. what's on television?
= with the words this/that/these/those.this book
= with possessive adjectives or the possessive case. this is my cer.this is kate's dress.