| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | work have [verb] on a | 10 |
|
| 2 | work has [verb] on a | 10 |
|
| 3 | work have [vb pp] on a | 10 |
|
| 4 | work have begin on a | 6 |
|
| 5 | work have begun on a | 6 |
|
