| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] to a | 485 |
|
| 2 | [v-ing] been [vb pp] to | 108 |
|
| 3 | [v-ing] been [vb pp] a | 23 |
|
| 4 | [v-ing] [vb pp] to a | 22 |
|
