| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to have been cause [prep] a | 8 |
|
| 2 | [verb] have been caused [prep] a | 8 |
|
| 3 | [verb] have been cause [prep] a | 8 |
|
| 4 | [verb] have been cause by a | 7 |
|
| 5 | [verb] have been cause by a | 7 |
|
| 6 | [vb pp] have been cause [prep] a | 7 |
|
