| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] [verb] on | 204 |
|
| 2 | has [been] [v-ing] on | 112 |
|
| 3 | have [been] working on | 47 |
|
| 4 | [verb] [been] working on | 47 |
|
| 5 | has [been] working [adv] | 42 |
|
| 6 | has [been] work on | 7 |
|
| 7 | [vb -s] [been] working on | 6 |
|
| 8 | has [be] working on | 6 |
|
