| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | did n't [vb infin] | 33284 |
|
| 2 | did they [vb infin] | 1236 |
|
| 3 | did n't they | 500 |
|
| 4 | n't they [vb infin] | 459 |
|
