| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been | 64011 |
|
| 2 | has been | 57482 |
|
| 3 | have been | 37548 |
|
| 4 | have been | 26691 |
|
| 5 | 've been | 8148 |
|
| 6 | 's been | 6609 |
|
| 7 | to have been | 5818 |
|
| 8 | 'd been | 4262 |
|
| 9 | having been | 2376 |
|
| 10 | 've been | 341 |
|
| 11 | had been | 62 |
|
