Coinciding with his rich life experiences, Chaucer’s literary career sometimes can be neatly divided into three periods.Firstl

Coinciding with his rich life experiences,Chaucer’s literary career sometimes can be neatly divided into three periods.Firstly,the French phase represented by The Romaunt of the Rose,a translation from French,shows Chaucer’s focus on language and subject.Secondly,the Italian phase represented by Troilus and Criseyde,an adaption from the Italian literary trend,shows his creativeness by borrowing foreign themes.Thirdly,the description of characters and intriguing plot establishes his reputation.As the founding father of English poetry,his effort to establish English as the language of literature is an indispensible part in shaping the English vernacular tradition.Meanwhile,his introduction of various French rhymed stanzas,especially the rhymed couplet of iambic pentameter is of importance to the development of English poetry.The Canterbury Tales,the monumental work of English poetry,is exemplary of iambic pentameter.