| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] [prep] | 1103 |
|
| 2 | [modal v] [not/n't] know | 966 |
|
| 3 | [not/n't] know [prep] | 952 |
|
| 4 | [modal v] know [prep] | 291 |
|
