| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had be [verb] to | 2095 |
|
| 2 | had be [vb pp] to | 1970 |
|
| 3 | [verb] be referred to | 120 |
|
| 4 | have be referred to | 110 |
|
| 5 | had be referred [prep] | 33 |
|
| 6 | had be referred [prep] | 33 |
|
| 7 | [vb past] be referred to | 26 |
|
| 8 | had be refer to | 25 |
|
| 9 | had [be] referred to | 24 |
|
| 10 | had be referred to | 24 |
|
