| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | might have be [vb pp] to have | 7 |
|
| 2 | might have been [vb pp] to have | 7 |
|
| 3 | might have [been] [vb pp] to have | 7 |
|
| 4 | might have [be] [vb pp] to have | 7 |
|
