| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] for years | 28 |
|
| 2 | have [been] [vb pp] for years | 28 |
|
| 3 | have [been] [vb pp] for years | 10 |
|
| 4 | had [been] [vb pp] for years | 10 |
|
| 5 | have [been] used for years | 6 |
|
| 6 | has [been] [vb pp] for years | 5 |
|
