| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [prep] [art] [noun] | 1022 |
|
| 2 | been working [prep] [art] [noun] | 148 |
|
| 3 | had been working [prep] [art] | 65 |
|
| 4 | had been working [prep] [noun] | 39 |
|
