| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have been [vb pp] | 2543 |
|
| 2 | they have [vb pp] a | 1756 |
|
| 3 | have been [vb pp] a | 1230 |
|
| 4 | they have been a | 54 |
|
