| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [verb] to be | 1095 |
|
| 2 | could be [verb] [prep] be | 170 |
|
| 3 | could be [verb] to [be] | 153 |
|
| 4 | could [be] [verb] to be | 153 |
|
