| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to have been cause | 28 |
|
| 2 | [vb pp] to have been cause | 17 |
|
| 3 | [adj] to have been cause | 8 |
|
| 4 | [adj] to have been cause | 8 |
|
| 5 | thought to have been cause | 7 |
|
| 6 | [vb past] to have been cause | 7 |
|
| 7 | think to have been cause | 7 |
|
| 8 | believe to have been cause | 6 |
|
| 9 | to have been cause [prep] | 33 |
|
| 10 | to have been cause [prep] | 33 |
|
| 11 | to have been cause by | 31 |
|
| 12 | to have been cause by | 31 |
|
