| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] had been working [prep] [art] | 9 |
|
| 2 | [Wh pn] had been working [prep] [art] | 9 |
|
| 3 | who had been working [prep] [art] | 9 |
|
| 4 | [Wh pn] had been working [prep] the | 8 |
|
| 5 | [Wh pn] had been working [prep] the | 8 |
|
