| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [been] [adv] | 2829 |
|
| 2 | might have [been] [adv] | 268 |
|
| 3 | might have [be] [adv] | 251 |
|
| 4 | might [verb] [been] [adv] | 251 |
|
