| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] at a [adj] | 171 |
|
| 2 | could be [vb pp] a [adj] | 34 |
|
| 3 | could be [vb pp] at a | 24 |
|
| 4 | could be [vb pp] at [adj] | 12 |
|
