| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] not know it at the | 12 |
|
| 2 | [verb] not know it at the | 12 |
|
| 3 | do not know it at the | 12 |
|
| 4 | did not know it at the | 12 |
|
| 5 | not know it at the time | 12 |
|
| 6 | not know it at the [noun] | 12 |
|
| 7 | not know it at the time | 12 |
|
| 8 | not know it at the [noun sg] | 12 |
|
