| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [verb] [prep] a | 1163 |
|
| 2 | could [be] [verb] [prep] be | 152 |
|
| 3 | [be] [verb] [prep] be a | 136 |
|
| 4 | could [verb] [prep] be a | 25 |
|
