| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which do [adv] exist | 7 |
|
| 2 | [Wh det] do not exist | 7 |
|
| 3 | [Wh det] do [not/n't] exist | 7 |
|
| 4 | [Wh det] do not exist | 7 |
|
