| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] on | 7809 |
|
| 2 | [be] [v-ing] on | 4286 |
|
| 3 | [be] working [adv] | 1267 |
|
| 4 | [be] working [adv prt] | 351 |
|
| 5 | [be] work on | 232 |
|
| 6 | [be] working on | 182 |
|
