| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [vb pp] [to-vb] | 28231 |
|
| 2 | [verb] whether [to-vb] | 738 |
|
| 3 | [verb] [vb pp] whether | 93 |
|
| 4 | [vb pp] whether [to-vb] | 33 |
|
