| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did [not/n't] [pers pn] [vb infin] us | 22 |
|
| 2 | why did n't [pers pn] [vb infin] us | 21 |
|
| 3 | why did [not/n't] you [vb infin] us | 15 |
|
| 4 | why did [not/n't] [pers pn] tell us | 10 |
|
