| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [pron] could [adv] have | 62 |
|
| 2 | [subord] it [vb mod] [adv] have | 51 |
|
| 3 | [subord] it [modal v] [adv] have | 51 |
|
| 4 | [subord] it could [adv] [verb] | 47 |
|
| 5 | [subord] it could [adv] [vb infin] | 47 |
|
| 6 | [conj] it could [adv] have | 45 |
|
| 7 | [subord] it could [adv] have | 19 |
|
| 8 | [subord] it could [adv] have | 12 |
|
| 9 | [subord] it could [adv] have | 12 |
|
