| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to have been [vb pp] by a | 55 |
|
| 2 | to have been [verb] by a | 55 |
|
| 3 | have been caused by a | 33 |
|
| 4 | [verb] been caused by a | 33 |
|
| 5 | to have been caused by [art] | 18 |
|
| 6 | to have been caused by [art] | 18 |
|
| 7 | to have been caused by a | 12 |
|
| 8 | to have been caused [prep] a | 9 |
|
| 9 | to have been caused [prep] a | 9 |
|
| 10 | to have be caused by a | 8 |
|
| 11 | to have [be] caused by a | 8 |
|
| 12 | [to-vb] been caused by a | 8 |
|
| 13 | to have [been] caused by a | 8 |
|
| 14 | to have been cause by a | 8 |
|
| 15 | to have been caused by a | 8 |
|
