| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] for two years | 29 |
|
| 2 | been [vb pp] [prep] two years | 27 |
|
| 3 | been [v-ing] [prep] two years | 12 |
|
| 4 | been [verb] to two years | 5 |
|
