| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [conj] could [adv] have | 13 |
|
| 2 | [adj] [coord] could [adv] have | 12 |
|
| 3 | [adj] and could [adv] have | 12 |
|
| 4 | [adj] and could [adv] have | 12 |
|
| 5 | [adj] [conj] could [adv] have | 8 |
|
| 6 | [adj] [conj] could not have | 5 |
|
| 7 | [adj] [conj] could not have | 5 |
|
| 8 | [adj] [conj] could [not/n't] have | 5 |
|
