| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been work [prep] | 162 |
|
| 2 | had been working [prep] | 155 |
|
| 3 | had been work on | 47 |
|
| 4 | had been work on | 47 |
|
| 5 | had been work in | 27 |
|
| 6 | had been work in | 27 |
|
| 7 | had been work for | 24 |
|
| 8 | had been work for | 24 |
|
| 9 | had been work at | 19 |
|
| 10 | had been work at | 19 |
|
| 11 | had been work with | 14 |
|
| 12 | had been work with | 14 |
|
| 13 | had been work as | 9 |
|
| 14 | had been work as | 9 |
|
