  Theorists have proposed contextualist theories for many other expressions, including: Conditionals (Lewis 1973, Kratzer 2012,  and the entry on   conditionals); deontic terms, such as ‘ought’ and ‘should’ (Lewis 1973, Kratzer 2012, Portner 2009); perspectival expressions, such as ‘come’, ‘go’, ‘left’, ‘right’, and ‘behind’ (Lewis 1979b); weather predicates, such as ‘rain’ and ‘hot’ (see Sennett 2008 for an overview); propositional attitude verbs, such as ‘believe’ (Richard 1990, and the entry on   propositional attitude reports); common nouns, such as ‘student’ and ‘table’ (Stanley and Szabo 2000); and vague expressions, which include nearly all expressions in natural languages (Raffman 1996, Soames 1999, Fara 2000,  and the entry on   vagueness).