| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | years have [been] | 358 |
|
| 2 | years have be | 358 |
|
| 3 | years have been | 358 |
|
| 4 | years has [be] | 195 |
|
| 5 | years have [be] | 93 |
|
| 6 | years had [be] | 66 |
|
