| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [adv] [prep] [art] | 160 |
|
| 2 | had been working [prep] [art] | 65 |
|
| 3 | been working [adv] [prep] [art] | 29 |
|
| 4 | had been working [adv] [prep] | 18 |
|
