| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [not/n't] know [prep] | 319 |
|
| 2 | [vb past] [not/n't] know [det] | 294 |
|
| 3 | [not/n't] know [prep] [det] | 238 |
|
| 4 | [vb past] [not/n't] [prep] [det] | 96 |
|
| 5 | [vb past] know [prep] [det] | 40 |
|
