| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been [v-ing] the | 54 |
|
| 2 | [vb mod] have been [v-ing] the | 53 |
|
| 3 | must have been [v-ing] the | 13 |
|
| 4 | might have been [v-ing] the | 10 |
|
| 5 | may have been [v-ing] the | 9 |
|
| 6 | should have been [v-ing] the | 7 |
|
