| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [verb] [pron] [prep] | 829 |
|
| 2 | could [adv] [verb] [pron] [prep] | 829 |
|
| 3 | [modal v] [adv] [verb] [pron] for | 505 |
|
| 4 | could [adv] [verb] [pron] for | 89 |
|
