| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they had been | 1999 |
|
| 2 | they have been | 1855 |
|
| 3 | they 've been | 1018 |
|
| 4 | they 'd been | 424 |
|
| 5 | they have been | 31 |
|
| 6 | they 've been | 5 |
|
