| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [v-ing] [prep] [art] | 721 |
|
| 2 | [adv] [been] [v-ing] [prep] [art] | 128 |
|
| 3 | [adv] had [been] [prep] [art] | 14 |
|
| 4 | [adv] had [been] [v-ing] [prep] | 10 |
|
