| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] for centuries | 37 |
|
| 2 | [verb] been [vb pp] for centuries | 32 |
|
| 3 | [vb -s] been [verb] for centuries | 20 |
|
| 4 | has been [verb] for centuries | 18 |
|
| 5 | have been [verb] for centuries | 10 |
|
| 6 | [vb base] been [verb] for centuries | 10 |
|
| 7 | [vb past] been [verb] for centuries | 7 |
|
| 8 | had been [verb] for centuries | 7 |
|
| 9 | [verb] been [v-ing] for centuries | 5 |
|
