| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [be] [vb pp] | 2493 |
|
| 2 | [adv] [be] [vb pp] [adj] | 349 |
|
| 3 | could [adv] [be] [adj] | 318 |
|
| 4 | could [be] [vb pp] [adj] | 239 |
|
