| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [verb] for [det] years | 38 |
|
| 2 | has been [vb pp] for [det] year | 31 |
|
| 3 | has been [verb] for many year | 27 |
|
| 4 | has been [verb] for some year | 8 |
|
| 5 | has been use for [det] year | 7 |
|
| 6 | has been [v-ing] for [det] year | 7 |
|
| 7 | has been used for [det] year | 7 |
|
| 8 | has been know for [det] year | 6 |
|
| 9 | has been known for [det] year | 6 |
|
