Which line is written in iambic pentameter? i really like horses and giraffes. i have ridden a horse, but i never fell off. i know a man who owns a horse. i came to see a man about a horse.

"I came to see a man about a horse" is written in iambic pentameter.

Here's another sentence written in iambic pentameter: "Shall I compare thee to a summer's day?"

Notice how the rhythm is the same for both sentences.