| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did [not/n't] he [vb infin] | 69 |
|
| 2 | did [not/n't] he [vb infin] [prep] | 22 |
|
| 3 | why did he [vb infin] [prep] | 18 |
|
