| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [vb pp] [prep] [v-ing] to | 5 |
|
| 2 | has been [vb pp] [prep] [v-ing] to | 5 |
|
| 3 | have been [vb pp] by [v-ing] to | 5 |
|
