| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [pron] [adv] have [vb pp] | 37 |
|
| 2 | could [pers pn] [adv] have [vb pp] | 37 |
|
| 3 | could [pron] [adv] have [vb pp] | 37 |
|
| 4 | could [pron] [adv] have [vb pp] | 22 |
|
| 5 | could [pron] not have [vb pp] | 15 |
|
| 6 | could [pron] [not/n't] have [vb pp] | 15 |
|
| 7 | could [pron] not have [vb pp] | 15 |
|
| 8 | could [pron] ever have [vb pp] | 10 |
|
| 9 | could she [adv] have [vb pp] | 10 |
|
| 10 | could she [adv] have [vb pp] | 10 |
|
| 11 | could [pron] ever have [vb pp] | 10 |
|
| 12 | could you [adv] have [vb pp] | 9 |
|
| 13 | could you [adv] have [vb pp] | 9 |
|
| 14 | could [pron] possibly have [vb pp] | 6 |
|
| 15 | could [pron] possibly have [vb pp] | 6 |
|
| 16 | could i [adv] have [vb pp] | 6 |
|
| 17 | could i [adv] have [vb pp] | 6 |
|
| 18 | could he [adv] have [vb pp] | 5 |
|
| 19 | could he [adv] have [vb pp] | 5 |
|
| 20 | could [pron] [adv] have known | 5 |
|
