| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [vb past] they [vb infin] | 339 |
|
| 2 | [vb past] n't they [vb infin] | 119 |
|
| 3 | [Wh adv] [vb past] n't they | 58 |
|
