| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [to-vb] whether [art] | 64 |
|
| 2 | [vb pp] [to-vb] whether [art] | 64 |
|
| 3 | [vb pp] [to-vb] whether a | 21 |
|
| 4 | [vb pp] [to-vb] [conj] an | 20 |
|
| 5 | [verb] [to-vb] whether an | 10 |
|
| 6 | [vb pp] [verb] whether an | 5 |
|
