| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] know [Wh det] it be for | 6 |
|
| 2 | n't know [Wh det] it be for | 5 |
|
| 3 | [not/n't] know [Wh det] it be for | 5 |
|
| 4 | not know [Wh det] it be for | 5 |
|
