1.   A fair swell was running, and the boat bobbed up and down like a cork on the surface.

2.   More than a dozen boats bobbed against the docks, their hulls restless in the approaching dusk.

3.   No wisteria cooing like fat blue pigeons from the eaves, no azure sea, no pretty boats bobbing on gentle waves.

4.   The boat bobbed gently up and down on the water.

5.   The small boat bobbed about on the choppy water.

6.   If we moor a tiny toy boat at some fixed point in the pond, the boat will bob up and down rhythmically as the waves pass under it.

7.   The frequency with which the boat bobs is analogous to the pitch of a sound.

8.   Once launched, the boat bobbed like a cork.

9.   The road curved along the bay, where unbarnacled boats bobbed in the pale green water.

10.   Two dozen boats bobbed at a dock and a line of moorings.