| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] [pron] [modal v] [verb] | 738 |
|
| 2 | [verb] whether [pron] [modal v] [verb] | 638 |
|
| 3 | [modal v] [verb] whether [pron] [verb] | 73 |
|
| 4 | [modal v] [verb] whether [pron] [modal v] | 33 |
|
