| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | years have [been] [verb] [prep] | 11 |
|
| 2 | years have [be] [vb pp] [prep] | 11 |
|
| 3 | years have been [verb] [prep] | 11 |
|
| 4 | years have be [verb] [prep] | 11 |
|
| 5 | years have [be] [verb] by | 5 |
|
