32.1 needn't come, needn't walk, needn't ask, needn't tell, needn't explain.
32.2 needn't, must, must, needn't, needn't, must, must, needn't, must.
32.2 she needn't have bought eggs, you needn't have shouted at me, he needn't have sold his car, we needn't have taken the camera, I needn't have rushed to the station