| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have been [vb pp] | 1045 |
|
| 2 | they have [vb pp] [art] | 944 |
|
| 3 | have been [vb pp] [art] | 338 |
|
| 4 | they have been [art] | 28 |
|
