| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [modal v] have been true | 10 |
|
| 2 | [det] [vb mod] have been true | 10 |
|
| 3 | [det] may have been true | 7 |
|
| 4 | [det] may have been true | 7 |
|
| 5 | this [modal v] have been true | 5 |
|
