| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [pron] [modal v] [verb] a | 232 |
|
| 2 | by [Wh det] [pron] [modal v] [verb] | 108 |
|
| 3 | by [Wh det] [pron] [verb] a | 19 |
|
