| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have [been] working | 39 |
|
| 2 | who [verb] [been] working | 39 |
|
| 3 | who [verb] been working | 39 |
|
| 4 | who [vb past] [been] working | 19 |
|
| 5 | who had [been] working | 16 |
|
| 6 | who [vb -s] [been] working | 12 |
|
| 7 | who has [been] working | 10 |
|
| 8 | who have [been] working | 8 |
|
| 9 | who [vb base] [been] working | 8 |
|
