| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [to-vb] it | 3076 |
|
| 2 | [to-vb] whether it | 238 |
|
| 3 | [vb past] [to-vb] whether | 198 |
|
| 4 | [vb past] whether it | 77 |
|
