| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] whether | 702 |
|
| 2 | [prep] [v-ing] whether | 702 |
|
| 3 | before [v-ing] [conj] | 220 |
|
| 4 | before [v-ing] [subord] | 72 |
|
| 5 | before [v-ing] whether | 52 |
|
| 6 | before [verb] whether | 52 |
|
| 7 | before [v-ing] whether | 52 |
|
