| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [pron] could | 1347 |
|
| 2 | [Wh adv] he [modal v] | 1119 |
|
| 3 | [Wh adv] he [vb mod] | 1119 |
|
| 4 | [adv] he could | 1045 |
|
| 5 | [Wh adv] he could | 253 |
|
