A line of iambic pentameter is made up of five such pairs of short/long, or unstressed/stressed, syllables. Iambic rhythms come relatively naturally in English.Iambic pentameter is the most common meter in English poetry; it is used in many of the major English poetic forms, including blank verse, the heroic couplet, and some of the traditional rhymed stanza forms.William Shakespeare used iambic pentameter in his plays and sonnets. line of iambic pentameter is made up of five such pairs of short/long, or unstressed/stressed, syllables. Iambic rhythms come relatively naturally in English.