| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not know at [art] time | 14 |
|
| 2 | not know [prep] the time | 14 |
|
| 3 | not know [prep] [art] time | 14 |
|
| 4 | not know [prep] the time | 14 |
|
| 5 | n't know [prep] [art] time | 12 |
|
