| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] to [be] a | 1973 |
|
| 2 | could be [verb] to [be] | 152 |
|
| 3 | could be [verb] to a | 84 |
|
| 4 | could [verb] to [be] a | 25 |
|
