| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [verb] been [verb] for years | 6 |
|
| 2 | who have been [verb] for year | 6 |
|
| 3 | who [verb] been [v-ing] for year | 6 |
|
| 4 | who [verb] been [verb] for year | 6 |
|
