| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] know if [pers pn] [modal v] come | 5 |
|
| 2 | [not/n't] know if [pers pn] [modal v] come | 5 |
|
| 3 | not know if [pers pn] [modal v] come | 5 |
|
| 4 | n't know if [pers pn] [modal v] come | 5 |
|
