| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | before [pron] could [verb] [pron] | 357 |
|
| 2 | [pron] could [verb] [adv] [pron] | 279 |
|
| 3 | before [pron] could [verb] [adv] | 126 |
|
| 4 | before [pron] [verb] [adv] [pron] | 121 |
|
