| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] could [be] | 1453 |
|
| 2 | as [modal v] [be] | 1266 |
|
| 3 | [subord] could [be] | 163 |
|
| 4 | as could [be] | 91 |
|
