| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [v-ing] [prep] | 1917 |
|
| 2 | [been] [v-ing] [prep] the | 1535 |
|
| 3 | had [been] [prep] the | 1091 |
|
| 4 | had [been] [v-ing] the | 346 |
|
