| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] been for years | 10 |
|
| 2 | [vb base] be for years | 10 |
|
| 3 | [vb base] [been] for years | 10 |
|
| 4 | have [be] for years | 8 |
|
