| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 've been [verb] on | 75 |
|
| 2 | 've [been] [verb] on | 75 |
|
| 3 | 've [been] [v-ing] on | 62 |
|
| 4 | 've [been] work on | 30 |
|
| 5 | 've [been] working on | 30 |
|
| 6 | 've [been] [vb pp] on | 13 |
|
| 7 | 've [been] concentrating on | 7 |
|
| 8 | 've [been] concentrate on | 7 |
|
