| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have had [verb] | 306 |
|
| 2 | might have [verb] [verb] | 203 |
|
| 3 | might have [vb pp] [verb] | 197 |
|
| 4 | might have have [verb] | 23 |
|
| 5 | might [verb] had [verb] | 23 |
|
