| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] be [vb pp] | 4743 |
|
| 2 | could [adv] be [adj] | 643 |
|
| 3 | [adv] be [vb pp] [adj] | 605 |
|
| 4 | could be [vb pp] [adj] | 239 |
|
