| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [verb] for | 1516 |
|
| 2 | had [been] [v-ing] for | 496 |
|
| 3 | had [been] working [prep] | 155 |
|
| 4 | had [been] working [prep] | 155 |
|
| 5 | have [been] working for | 66 |
|
| 6 | [verb] [been] working for | 66 |
|
| 7 | [vb past] [been] working for | 26 |
|
| 8 | had [be] working for | 24 |
|
| 9 | had [been] work for | 24 |
|
| 10 | had [been] working for | 24 |
|
