| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [adv] [been] [v-ing] for | 35 |
|
| 2 | had [adv] been [v-ing] for | 35 |
|
| 3 | had [adv] be [v-ing] for | 35 |
|
| 4 | had already [be] [v-ing] for | 9 |
|
