| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been in [det] [noun sg] | 18 |
|
| 2 | [modal v] have been in this [noun sg] | 6 |
|
| 3 | could have been in [det] [noun sg] | 6 |
|
| 4 | could have been in [det] [noun sg] | 6 |
|
