| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [pron] could | 4860 |
|
| 2 | [adv] [Wh det] [pron] | 4368 |
|
| 3 | [Wh det] [pron] could | 1915 |
|
| 4 | [adv] [Wh det] could | 48 |
|
