| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] had been [vb pp] on | 22 |
|
| 2 | [noun pl] had been going on | 9 |
|
| 3 | [noun pl] had been go on | 9 |
|
| 4 | [noun pl] had been [v-ing] on | 9 |
|
| 5 | [noun pl] had been take on | 5 |
|
| 6 | [noun pl] had been taken on | 5 |
|
