| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] for [det] century | 5 |
|
| 2 | have [been] [vb pp] for [det] century | 5 |
|
| 3 | have be [vb pp] for [det] century | 5 |
|
| 4 | have [be] [vb pp] for [det] centuries | 5 |
|
