| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [be] [art] [noun] | 210 |
|
| 2 | [modal v] [adv] [be] [art] matter | 74 |
|
| 3 | could [adv] [be] [art] matter | 8 |
|
| 4 | could [adv] [be] [art] matter | 8 |
|
