| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] been [verb] [prep] two years | 14 |
|
| 2 | has been [verb] [prep] two years | 12 |
|
| 3 | [vb -s] been [verb] for two years | 11 |
|
| 4 | [vb -s] been [vb pp] [prep] two years | 10 |
|
