| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been [verb] [noun prp] | 18 |
|
| 2 | [vb mod] have been [v-ing] [noun prp] | 11 |
|
| 3 | might have been [verb] [noun prp] | 6 |
|
| 4 | [vb mod] have been [vb pp] [noun prp] | 6 |
|
