| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should have [vb pp] is | 9 |
|
| 2 | [vb mod] have done is | 8 |
|
| 3 | would have [vb pp] is | 8 |
|
| 4 | might have [vb pp] is | 5 |
|
