| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] by [adv] [adj] | 339 |
|
| 2 | could be [vb pp] by [adj] | 163 |
|
| 3 | could be [vb pp] [adv] [adj] | 39 |
|
| 4 | could be [vb pp] by [adv] | 32 |
|
