| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [verb] on | 104 |
|
| 2 | have [been] working [adv] | 50 |
|
| 3 | have [been] working on | 47 |
|
| 4 | [verb] [been] working on | 47 |
|
| 5 | have [been] [v-ing] on | 38 |
|
| 6 | [vb base] [been] working on | 20 |
|
| 7 | have [been] work on | 8 |
|
| 8 | have [be] working on | 7 |
|
