Free verse poetry continued to evolve throughout the 20th century，beginning with poets such as Carl Sandburg(卡尔·桑博格)and Robert Frost(罗伯特·弗罗斯特)，both of whom were equally comfortable with formal and free verse poetry.Perhaps the most admired free verse poet was the expatriate Ezra Pound，who became a mentor to many of the 20th century's most famous authors and poets.
