| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] been for centuries | 6 |
|
| 2 | [pers pn] [verb] been for centuries | 6 |
|
| 3 | [pron] have been for centuries | 6 |
|
| 4 | it [verb] been for centuries | 6 |
|
