| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why is n't [pers pn] [verb] | 15 |
|
| 2 | why is n't [pers pn] [v-ing] | 12 |
|
| 3 | why is n't it [verb] | 8 |
|
| 4 | why is n't he [verb] | 6 |
|
