| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [adv] [Wh adv] [pron] | 127 |
|
| 2 | [vb past] [Wh adv] [pron] could | 85 |
|
| 3 | [vb past] [adv] [pron] could | 77 |
|
| 4 | [adv] [Wh adv] [pron] could | 27 |
|
