| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [prep] | 336 |
|
| 2 | been [v-ing] on [prep] | 237 |
|
| 3 | have been [v-ing] on | 13 |
|
| 4 | have been on [prep] | 5 |
|
