| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [conj] [to-vb] [prep] [noun sg] | 13 |
|
| 2 | [prep] whether [to-vb] [prep] [noun] | 10 |
|
| 3 | [prep] whether [verb] [prep] [noun sg] | 8 |
|
