| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [prep] whether [art] | 107 |
|
| 2 | [verb] to whether [art] | 56 |
|
| 3 | [v-ing] to [conj] [art] | 53 |
|
| 4 | [v-ing] to [subord] [art] | 42 |
|
| 5 | [v-ing] to whether [art] | 41 |
|
