| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have been [verb] | 4625 |
|
| 2 | [pron] have been working | 497 |
|
| 3 | which have been [v-ing] | 361 |
|
| 4 | which have been work | 18 |
|
| 5 | [Wh det] have been working | 12 |
|
| 6 | which have be working | 12 |
|
| 7 | which have [be] working | 12 |
|
| 8 | which [verb] been working | 12 |
|
| 9 | which have [been] working | 12 |
|
| 10 | which have been working | 12 |
|
