| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] work [prep] a | 13 |
|
| 2 | have been work [prep] a | 13 |
|
| 3 | have [been] working [prep] a | 12 |
|
| 4 | have [been] work [prep] a | 12 |
|
| 5 | have [been] work on a | 7 |
|
| 6 | have [been] work on a | 7 |
|
