| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [verb] for three years | 16 |
|
| 2 | [verb] [vb pp] for three years | 15 |
|
| 3 | has [verb] for three years | 8 |
|
| 4 | [vb -s] [verb] for three years | 8 |
|
| 5 | [vb past] [verb] for three years | 5 |
|
