| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] for three years | 25 |
|
| 2 | have been [verb] for three year | 25 |
|
| 3 | has been [verb] for three year | 16 |
|
| 4 | have been [vb pp] for three year | 14 |
|
| 5 | have been [v-ing] for three year | 11 |
|
