| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have been working [prep] | 29 |
|
| 2 | who [verb] been working [prep] | 29 |
|
| 3 | who [vb past] been working [prep] | 14 |
|
| 4 | who had been working [prep] | 12 |
|
| 5 | who [verb] been working on | 10 |
|
| 6 | who [verb] been working in | 9 |
|
| 7 | who [vb -s] been working [prep] | 9 |
|
| 8 | who has been working [prep] | 8 |
|
| 9 | who have been working [prep] | 6 |
|
| 10 | who [vb base] been working [prep] | 6 |
|
