| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [v-ing] [prep] a long | 8 |
|
| 2 | had been [v-ing] [prep] a long | 8 |
|
| 3 | had [been] [v-ing] [prep] a long | 8 |
|
| 4 | had [been] [v-ing] for a long | 7 |
|
