| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been referred to | 110 |
|
| 2 | have been referred to | 110 |
|
| 3 | having been [vb pp] to | 108 |
|
| 4 | having been [verb] to | 108 |
|
| 5 | having [be] referred to | 5 |
|
| 6 | having be referred to | 5 |
|
| 7 | having been referred to | 5 |
|
| 8 | having [been] referred to | 5 |
|
| 9 | having been referred [prep] | 5 |
|
| 10 | having been refer to | 5 |
|
| 11 | having been referred [prep] | 5 |
|
| 12 | [v-ing] been referred to | 5 |
|
