| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] be [v-ing] on [det] | 19 |
|
| 2 | [vb base] [be] [v-ing] on [det] | 19 |
|
| 3 | [vb base] [been] [v-ing] on [det] | 18 |
|
| 4 | [vb base] been [v-ing] on [det] | 18 |
|
| 5 | [vb base] [be] working on [det] | 13 |
|
| 6 | 've [be] [v-ing] on [det] | 9 |
|
| 7 | have [be] [v-ing] on [det] | 9 |
|
| 8 | [vb base] [be] [v-ing] on this | 8 |
|
