| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [verb] [prep] a | 971 |
|
| 2 | [coord] could be [verb] [prep] | 163 |
|
| 3 | [coord] be [verb] [prep] a | 90 |
|
| 4 | [coord] could [verb] [prep] a | 24 |
|
