| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [v-ing] for [noun] | 81 |
|
| 2 | [noun pl] had [been] [v-ing] [noun] | 45 |
|
| 3 | [noun pl] had [been] [v-ing] for | 40 |
|
