| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] whether [verb] [art] | 72 |
|
| 2 | about [conj] [verb] [art] | 26 |
|
| 3 | about [subord] [verb] [art] | 11 |
|
| 4 | about whether [verb] [art] | 10 |
|
