| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [vb mod] [not/n't] [n mass] | 12 |
|
| 2 | why [modal v] [not/n't] people | 12 |
|
| 3 | why [modal v] n't [n mass] | 11 |
|
| 4 | why ca [not/n't] [n mass] | 6 |
|
| 5 | why can [not/n't] [n mass] | 6 |
|
