You will note that the example is not perfect. Iambic pentameter need not always be precisely formal. In fact it rarely is. Notice that in this quote from Matthew Arnold's "Dover Beach," the meter is not precise, but the opening and ending feet are distinctly in iambic pentameter, and the line is otherwise predominantly this style: | You will note that the example is not perfect. Iambic pentameter need not always be precisely formal. In fact it rarely is. Notice that in this quote from Matthew Arnold's "Dover Beach," the meter is not precise, but the opening and ending feet are distinctly in iambic pentameter, and the line is otherwise predominantly this style: |