| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been a [adj] shock | 9 |
|
| 2 | [vb mod] have been a [adj] shock | 9 |
|
| 3 | [modal v] have been a [adj] shock | 9 |
|
| 4 | must have been a [adj] shock | 9 |
|
