| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [verb] to [be] | 1088 |
|
| 2 | could [be] [verb] to [be] | 153 |
|
| 3 | could [be] [verb] [prep] [be] | 152 |
|
| 4 | could [be] [verb] to [be] | 152 |
|
| 5 | could [be] [verb] [prep] [be] | 152 |
|
