| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did [not/n't] [pers pn] let | 12 |
|
| 2 | why [vb past] n't [pers pn] let | 12 |
|
| 3 | why [vb past] [not/n't] you let | 10 |
|
