| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been [verb] for a | 31 |
|
| 2 | [modal v] have been [verb] for a | 31 |
|
| 3 | [modal v] have been [verb] for a | 27 |
|
| 4 | [modal v] have been [vb pp] for a | 25 |
|
| 5 | could have been [verb] for a | 8 |
|
| 6 | could have been [verb] for a | 8 |
|
| 7 | would have been [verb] for a | 8 |
|
| 8 | would have been [verb] for a | 7 |
|
| 9 | must have been [verb] for a | 6 |
|
| 10 | must have been [verb] for a | 6 |
|
| 11 | [modal v] have been [v-ing] for a | 6 |
|
| 12 | [modal v] have been mistaken for a | 5 |
|
| 13 | [modal v] have been mistake for a | 5 |
|
