| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] to | 6486 |
|
| 2 | have been [vb pp] to | 5959 |
|
| 3 | have been referred [prep] | 128 |
|
| 4 | have been referred [prep] | 128 |
|
| 5 | have been refer to | 125 |
|
| 6 | [verb] been referred to | 110 |
|
| 7 | have been referred to | 110 |
|
| 8 | have be referred to | 110 |
|
| 9 | have [be] referred to | 110 |
|
| 10 | have [been] referred to | 110 |
|
