| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been for centuries | 8 |
|
| 2 | [verb] been for centuries | 8 |
|
| 3 | been [verb] for centuries | 38 |
|
| 4 | been [vb pp] for centuries | 33 |
|
| 5 | been [adj] for centuries | 8 |
|
| 6 | been [adj] for centuries | 8 |
|
| 7 | been [v-ing] for centuries | 5 |
|
