| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [pron] could | 1347 |
|
| 2 | [Wh adv] [indef pn] [modal v] | 306 |
|
| 3 | [Wh adv] [indef pn] [vb mod] | 306 |
|
| 4 | [adv] [indef pn] could | 198 |
|
| 5 | [Wh adv] [indef pn] could | 62 |
|
