| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] had been [v-ing] on | 32 |
|
| 2 | he had been [v-ing] on | 16 |
|
| 3 | [pers pn] had been working on | 14 |
|
| 4 | she had been [v-ing] on | 9 |
|
| 5 | [pers pn] had been sitting on | 5 |
|
| 6 | [pers pn] had been going on | 5 |
|
