| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to have been [verb] [prep] a | 162 |
|
| 2 | to have been [vb pp] [prep] a | 159 |
|
| 3 | [verb] been caused [prep] a | 35 |
|
| 4 | have been caused [prep] a | 35 |
|
| 5 | to have been caused [prep] [art] | 19 |
|
| 6 | to have been caused [prep] [art] | 19 |
|
| 7 | to have been caused [prep] a | 13 |
|
| 8 | to have been cause [prep] a | 9 |
|
| 9 | to have [been] caused [prep] a | 9 |
|
| 10 | to have be caused [prep] a | 9 |
|
| 11 | [to-vb] been caused [prep] a | 9 |
|
| 12 | to have [be] caused [prep] a | 9 |
|
