| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [v-ing] [prep] [noun sg] | 136 |
|
| 2 | been [v-ing] [prep] an [noun sg] | 48 |
|
| 3 | had been [v-ing] [prep] an | 31 |
|
| 4 | had been [v-ing] an [noun sg] | 24 |
|
| 5 | had been [prep] an [noun sg] | 17 |
|
