| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [pron] had [been] [v-ing] | 730 |
|
| 2 | [vb past] [conj] [pron] had [been] | 653 |
|
| 3 | [vb past] [pron] had [been] [v-ing] | 91 |
|
