| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been caused [prep] [adj] | 10 |
|
| 2 | [vb mod] have been caused [prep] [adj] | 10 |
|
| 3 | [modal v] have been caused by [adj] | 9 |
|
| 4 | [modal v] have been caused [prep] [det] | 5 |
|
| 5 | [modal v] have been caused [prep] [adj] | 5 |
|
