| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] [conj] [to-vb] [prep] [noun sg] | 19 |
|
| 2 | [verb] whether [to-vb] [prep] [noun sg] | 14 |
|
| 3 | [to-vb] whether [to-vb] [prep] [noun] | 6 |
|
| 4 | [to-vb] whether [verb] [prep] [noun sg] | 5 |
|
