| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] [vb mod] | 3221 |
|
| 2 | [prep] [Wh det] [modal v] | 3221 |
|
| 3 | [prep] [pron] may | 808 |
|
| 4 | [prep] [Wh det] may | 383 |
|
| 5 | [prep] [Wh det] may | 383 |
|
