| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] at a [noun] | 234 |
|
| 2 | could be [vb pp] at [noun] | 58 |
|
| 3 | could be [vb pp] a [noun] | 46 |
|
| 4 | could be [vb pp] at a | 24 |
|
