| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] been [v-ing] on | 191 |
|
| 2 | [vb -s] [been] going on | 160 |
|
| 3 | has [been] [v-ing] on | 112 |
|
| 4 | 's [been] [v-ing] on | 79 |
|
| 5 | [vb -s] [been] working on | 6 |
|
