| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [prep] whether [art] | 312 |
|
| 2 | [subord] [prep] [verb] [art] | 240 |
|
| 3 | [prep] whether [verb] [art] | 72 |
|
| 4 | [subord] [prep] whether [verb] | 47 |
|
