| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] be [vb pp] [adv] | 1730 |
|
| 2 | could [adv] be [vb pp] [adv] | 485 |
|
| 3 | could [adv] be [verb] [adv] | 257 |
|
| 4 | could [adv] [be] [vb pp] [adv] | 247 |
|
