| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [pron] could | 6409 |
|
| 2 | [Wh adv] [pron] could | 1347 |
|
| 3 | when [pron] [modal v] | 1028 |
|
| 4 | when [pron] [vb mod] | 1028 |
|
| 5 | when [pron] could | 153 |
|
| 6 | when [pron] could | 153 |
|
