| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [adv] have | 1769 |
|
| 2 | which [vb mod] [adv] have | 423 |
|
| 3 | which [modal v] [adv] have | 423 |
|
| 4 | which could [adv] [verb] | 258 |
|
| 5 | which could [adv] [vb infin] | 258 |
|
| 6 | [Wh det] could [adv] have | 66 |
|
| 7 | which could [adv] have | 60 |
|
| 8 | which could [adv] have | 60 |
|
| 9 | which could [adv] have | 60 |
|
