| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [modal v] [pron] [adv] | 84 |
|
| 2 | [Wh det] [vb mod] [pron] [adv] | 84 |
|
| 3 | [pron] could [pron] [adv] | 31 |
|
| 4 | [Wh det] could [pron] [adv] | 19 |
|
