| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been [v-ing] | 1003 |
|
| 2 | might have been [verb] | 907 |
|
| 3 | might have be [v-ing] | 135 |
|
| 4 | might have [been] [v-ing] | 135 |
|
| 5 | might have [be] [v-ing] | 135 |
|
| 6 | might [verb] been [v-ing] | 135 |
|
