Iambic pentameter is a style of verse. Iambic tells us the beat, and pentameter tells us how many pairs of beats. An iambic beat stresses the second syllable in a pair of syllables. The beat goes "dumDA". Pentameter tells us how many pairs of beats to have in a line, which is five: "dumDA, dumDA, dumDA, dumDA, dumDA". An example of blank verse is Duncan's first line in A2:S1 "what BLOO, dy MAN, is THAT, he CAN, rePORT".