A new law <em>must be passed </em>before tomorrow. The complete verb phrase is <em>must be passed</em>. The main verb is <em>pass</em> in the past: <em>passed</em>. Then, there are two aulixiaries: <em> must</em> , which indicates moral obligation and<em> be </em> which indicates passive voice. This means that a law must be passed by an institution such as Parliament or Congress.
He decides to walk to the duck pond in Central Park to see if the ducks are still around. Along the way, he becomes quite upset when he drops and breaks the record he had bought for Phoebe.
