| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] [prep] | 17588 |
|
| 2 | had been [v-ing] [prep] | 1917 |
|
| 3 | have been working [prep] | 484 |
|
| 4 | [verb] been working [prep] | 484 |
|
| 5 | [vb past] been working [prep] | 175 |
|
| 6 | had been work [prep] | 162 |
|
| 7 | had [be] working [prep] | 156 |
|
| 8 | had be working [prep] | 156 |
|
| 9 | had [been] working [prep] | 155 |
|
