| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [conj] it [vb mod] | 1052 |
|
| 2 | [verb] whether it [vb mod] | 178 |
|
| 3 | [vb past] whether [pron] [vb mod] | 143 |
|
| 4 | [vb past] whether it [modal v] | 21 |
|
