| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know it could [adv] be | 13 |
|
| 2 | know it could not be | 12 |
|
| 3 | know it could [not/n't] be | 12 |
|
| 4 | knew it could [adv] be | 11 |
|
| 5 | know it could not be | 8 |
|
