| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [adv] [verb] | 949 |
|
| 2 | [vb mod] [adv] [adv] have | 597 |
|
| 3 | [modal v] [adv] [adv] have | 597 |
|
| 4 | could [adv] [adv] have | 268 |
|
| 5 | could [adv] [adv] have | 123 |
|
| 6 | could [adv] [adv] have | 115 |
|
