| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] know [pron] | 297 |
|
| 2 | [not/n't] know [prep] [pron] | 278 |
|
| 3 | [modal v] [not/n't] [prep] [pron] | 129 |
|
| 4 | [modal v] know [prep] [pron] | 86 |
|
| 5 | [modal v] [not/n't] know [prep] | 80 |
|
