| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] by a [noun] | 6701 |
|
| 2 | could be [vb pp] by [noun] | 278 |
|
| 3 | could be [vb pp] by a | 147 |
|
| 4 | could be [vb pp] a [noun] | 46 |
|
