| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [v-ing] whether [art] | 25 |
|
| 2 | when [v-ing] [conj] [art] | 25 |
|
| 3 | when [v-ing] [subord] [art] | 22 |
|
| 4 | when [verb] whether [art] | 20 |
|
| 5 | when [v-ing] whether [art] | 17 |
|
| 6 | when [v-ing] whether [art] | 17 |
|
