| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] n't [prep] | 1608 |
|
| 2 | [was/were] know [prep] | 877 |
|
| 3 | n't know [prep] | 792 |
|
| 4 | [was/were] n't know | 36 |
|
