| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] by a | 1684 |
|
| 2 | been [vb pp] by a | 1681 |
|
| 3 | be caused by a | 222 |
|
| 4 | [be] caused by a | 222 |
|
| 5 | been caused by [art] | 105 |
|
| 6 | been caused [prep] a | 46 |
|
| 7 | [been] caused by a | 43 |
|
| 8 | been cause by a | 43 |
|
