| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] to | 7884 |
|
| 2 | been [vb pp] to | 7229 |
|
| 3 | [be] referred to | 1499 |
|
| 4 | be referred to | 1499 |
|
| 5 | been referred [prep] | 183 |
|
| 6 | been referred [prep] | 183 |
|
| 7 | been refer to | 176 |
|
| 8 | [been] referred to | 159 |
|
| 9 | been referred to | 159 |
|
