| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [that] have been [v-ing] on | 10 |
|
| 2 | that [verb] been [v-ing] on | 10 |
|
| 3 | [that] had been [v-ing] on | 6 |
|
| 4 | [that] [vb past] been [v-ing] on | 6 |
|
