| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] [verb] for years | 15 |
|
| 2 | has been [verb] for years | 15 |
|
| 3 | has [been] [v-ing] for years | 10 |
|
| 4 | has [been] [vb pp] for years | 5 |
|
