| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been part | 73 |
|
| 2 | have been part | 36 |
|
| 3 | has been part | 29 |
|
| 4 | have been part | 16 |
|
| 5 | to have been part | 16 |
|
| 6 | 's been part | 5 |
|
