| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] whether it [vb past] | 14 |
|
| 2 | [vb infin] whether it [vb past] | 14 |
|
| 3 | know whether it [vb past] | 7 |
|
| 4 | [vb infin] whether it had | 5 |
|
